If a single point mutation in the gene encoding ras protein allows this protein to stay in an active form for longer periods, even in the absence of a signal, then this gene is an oncogene.
What is an oncogene?An oncogene can be defined as a gene that is able to activate cancer pathways when suffering mutation and or expressed in different cells that it is usually not expressed, which may be due to diverse types of genetic alterations such as in this case a point mutation.
Conversely, a tumor suppressor gene is a gene expressed to suppress cancer pathways by inhibiting cell division during the cell cycle.
Therefore, with this data, we can see that an oncogene is a gene capable of leading to cancer when it is expressed in a defective way such as occurring in presence of a mutation that activates it.
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When there is no pattern to a
population's growth, it is known as
A. cyclical
C. irruptive
B. declining
D. irregular
Answer: D. irregular
Explanation:
antibodies are capable of binding up several antigens at once in order to reduce the number of infectious agents that need to be dealt with. this function of antibodies is known as group of answer choices opsonization. neutralization. agglutination. complement fixation.
Antibodies are capable of binding up several antigens in order to reduce infectious agents that need to be dealt with, this function of antibodies is known as agglutination.
Antibodies are proteins that defend you while an unwanted substance enters your body. Produced via your immune device, antibodies bind to these undesirable substances which will put off them out of your gadget.
Antibodies are proteins produced by means of the immune gadget in reaction to contamination. They're an vital part of the frame's defence device as they work to smash sickness-causing organisms and block them from infecting human cells.
Antibodies are positioned in various areas of your frame, such as your skin, lungs, tears, saliva and even breast milk. In reality, high quantities of antibodies are present in colostrum.
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Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber. conifer trees along water's edge. photo by anne burgess how has the douglas-fir adapted to enable its survival in the taiga biome?
a. low growing
b. perennial
c. waxy needles
d. survive on limited nutrients please select the best answer from the choices provided a b c d
Seasonal color changes are the unique adaptation that helps snowshoe rabbits to survive in the taiga.
The organisms that inhabit the taiga and alpine biomes have evolved special adaptations to help them survive. One of the creatures inhabiting the taiga biome is the snowshoe rabbit. It is exceptional in that it can remain unseen while hiding from predators in the snow in the winter and in woody areas in the summer. The organisms that inhabit the taiga and alpine biomes have evolved special adaptations to help them survive. One of the plants that may be found in the alpine biome is the moss campion. It is shielded from the wind and subfreezing cold in the alpine by its thin leaves and cushion-like shape.
Hence, organism characteristics decides its survival in different biome.
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Which technology below would probably be the most important to a person who had diabetes and had to take insulin every day?
4. MSUD is found in one newborn in 200,000 throughout the United States, but one newborn in 200 in the Amish and Mennonites of Lancaster County, Pennsylvania has the disease. Why is there such a difference in the prevalence of the disease?
Answer:
MSUD stands for Maple Syrup Urine Disease. It is very rare, it occurs in about 1 of every 185,000 births worldwide. A child is born with MSUD when both parents are carriers of three specific gene mutations (changes) – one copy from each parent. These three specific amino acids are leucine, isoleucine and valine. Without the needed enzymes, the three amino acids build up and so do their toxic byproducts that are known as ketoacids.
MSUD occurs more often in communities that have little genetic variation (such as the Mennonite and Amish community) These groups have a closure of people (like they marry with their closed relatives) who are carriers of the mutated gene.
which autonomic ganglion, located anterior to the ear, receives parasympathetic axons from the glossopharyngeal nerve (cn ix)?
Parasympathetic, sympathetic, sensory, and motor roots can all be found in the otic ganglion.
All branches of the mandibular division of the trigeminal nerve receive postganglionic parasympathetic secretomotor fibres from the otic ganglion. Additionally, the parotid gland receives sympathetic vasomotor fibres from it. The infratemporal fossa's medial side and the tiny parasympathetic ganglion known as the otic ganglion are both situated just below the foramen ovale. It functions as the glossopharyngeal nerve's functional partner and innervates the parotid gland to stimulate salivation. The auriculotemporal nerve most likely sends signals to the superficial temporal artery from the otic ganglia. Because migraine attacks involve the superficial temporal artery, this is clinically intriguing.
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A primary difference between transcription and replication is that transcription
Answer: Replication is the duplication of two-strands of DNA.
Explanation:
Transcription is the formation of single, identical RNA from the two-stranded DNA.
what is the likely cause of the change in frequency of melanic moths in michigan (mustard-colored diamonds), in pennsylvania (blue squares), and at caldy common in england (red dots)?
Air pollution has decreased in all regions is the likely cause of the change in frequency of melanic moths in michigan (mustard-colored diamonds), in pennsylvania (blue squares), and at caldy common in england (red dots)
The peppered moth's evolution is an example of how air pollution during the Industrial Revolution caused directional colour changes in the moth population.
At that time, a manifestation of industrial melanism was the rise in the number of dark-colored moths. Later, as pollution levels dropped, the light-colored form once more took control. Charles Darwin's theory of natural selection underwent its first test with the industrial melanism in the peppered moth, which is still used as a standard illustration for explaining evolution.
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The founder effect is an example of _______.
Answer:
The founder effect is an example of genetic drift
explanation:A population has members with the same appearance and features, such members encounter similar problems in the environment they live in. Some members of the population start living in a different place due to some reason. In that new area, they form a colony and start to adapt to different environments. This is called the founder effect. This brings change into sets of genes causing genetic drift.
VERY IMPORTANT WILL MARK
2. Which extreme organism is the most extreme? Why?
Answer:
Extremophilic microbes
Explanation:
The Most Extreme Creatures Extremophilic microbes are a wild bunch. They can be found thriving in some of the most hostile environments imaginable - swimming in near-boiling water, eating rocks, lounging in sub-zero temperatures, and hanging out where radiation levels rival nuclear reactors.
A certain species of grasshopper can have red stripes, yellow stripes, or red and yellow stripes. An RR grasshopper has red stripes, a YY grasshopper has yellow stripes, and an RY grasshopper has red and yellow stripes.
A grasshopper with red and yellow stripes mates with another grasshopper with red and yellow stripes.
What ratio would be expected in the phenotypes of their offspring?
1 with red stripes : 2 with red and yellow stripes : 1 with yellow stripes
2 with red and yellow stripes : 2 with yellow stripes
3 with red and yellow stripes : 1 with yellow stripes
3 with red stripes : 1 with yellow stripes
The expected phenotype ratio of the offspring from the cross would be 1 with red stripe, 2 with red and yellow stripes, and 1 with yellow stripe. Option 1.
Monohybrid crossingAccording to the illustration, the inheritance pattern of color in the grasshopper species is codominance.
Red striped grasshopper is RR, and the yellow stripe is YY, while RY grasshoppers have both red and yellow stripes.
Now, a grasshopper with red and yellow stripes (RY) mates with another grasshopper who also has red and yellow stripes (RY):
RY x RY
RR RY RY YY
Since RR is red stripe, RY is red/yellow stripes, and YY is yellow stripe; then, the phenotype ratio of the offspring from the cross would be:
1/4 or 25% red stripe1/2 or 50% red and yellow stripes1/4 or 25% yellow stripeIn other words, the phenotype ratio from the cross would be 1 with red stripe, 2 with red and yellow stripes, and 1 with yellow stripe.
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7. suppose a scientist discovers a gene that he believes promotes pluripotency. how could he test this possibility?
suppose a scientist discovers a gene that he believes promotes pluripotency. he could test this possibility by depleting it from the somatic nucleus to see if nuclear reprogramming becomes less efficient
What is Pluripotency?The capacity of some substances to elicit a variety of unique biological reactions is referred to as the pluripotency of biological molecules. As with pluripotent stem cells' ability to differentiate into several cell types, pluripotent is also used to denote something that has no predetermined developmental potential.
What makes anything pluripotent?A term with several "potentials" is plural. In other words, these cells have the capacity to transform into all more than 200 different cell types in the body. Both induced pluripotent stem (iPS) cells, which are reprogrammed from adult tissues, and embryonic stem cells are pluripotent.
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Complete question:
Suppose a scientist discovers a gene that he believes promotes pluripotency. How could he test this possibility?
a. Transduce it into somatic cells with Oct4, Sox2, c-myc, and Klf4 to see if nuclear reprogramming becomes more efficient
b. In a somatic cell nuclear transfer experiment, deplete it from enucleated eggs to see if nuclear reprogramming becomes less efficient
c. In a somatic cell nuclear transfer experiment, deplete it from the somatic nucleus to see if nuclear reprogramming becomes less efficient
d. In a somatic cell nuclear transfer experiment, deplete it from enucleated eggs to see if nuclear reprogramming becomes more efficient
e. Two of the above answers are correct
the biggest problem with the shotgun technique is its tendency to underestimate the size of the genome. which of the following might best account for this? a) skipping some of the clones to be sequenced b) missing some of the overlapping regions of the clones c) counting some of the overlapping regions of the clones twice d) having some of the clones die during the experiment and therefore not be represented
Option D. is correct, The shotgun method's major flaw is its propensity to overestimate the size of the genome.
The DNA sequence of an organism's genome can be ascertained in a lab setting using a process called shotgun sequencing. The process entails randomly dividing the genome into tiny DNA fragments that are then individually sequenced. First proposed in 1979, whole genome shotgun sequencing for small (4000 to 7000 base-pair) genomes. The genome of the cauliflower mosaic virus was the first one to be shotgun sequenced and was made public in 1981. Hierarchical shotgun sequencing, which requires the first generation of a low-resolution map of the genome, is slower than whole-genome shotgun sequencing but uses fewer computer methods.
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The otter allele is found in Lane 2. To which population does it belong
DNA fingerprints are all the genetic markers used to differentiate individuals or populations. In the exposed example, the otter from lane two belong to population 2, Esther passage, because its band is 890 PB in length.
What is DNA fingerprint?
We can refer to DNA fingerprint as the group of genetic markers that differentiate an individual from another individual, or a population from another population.
Genetic markers are unique DNA fragments that are not identical in all individuals or populations. These fragments provide unique information about the individual or the population, so they are usually used to analyze differences, identify a progenitor, or solve a crime.
DNA prints are used to identify the population origin of an individual, or filial relationships, among others.
In the exposed example, we have DNA samples of 8 individuals belonging to three different populations.
Two alleles are used as markers to identify the individual belonging to each group.
Population 1 ⇒ Unakwik inlet ⇒ 610 and 890 bp band length ⇒ both allelesPopulation 2 ⇒ Esther passage ⇒ 890 bp band length ⇒ one allelePopulation 3 ⇒ Wells bay ⇒ 610 bp band length ⇒ the other alleleTo identify individuals belonging to each group, we just need to count the number of band they express.
In the case of individual number 2 (lane 2), there is only one band. So we can dismiss population 1 (because this population has the two alleles).
The expressed band is approximately 890 pb length. It means that it belongs to population 2, Esther passage.
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How do scientists study the interactions and flow of matter and energy within and between earths
Which of the following is a characteristic of offspring produced by meiosis, and does not characterize offspring produced by mitosis?
A.
four haploid cells with chromosomes and alleles that are genetically different than the parents
B.
four haploid cells with chromosomes and alleles that are genetically identical to the parents
C.
two diploid cells with chromosomes and alleles that that are genetically different than the parents
D.
two diploid cells with chromosomes and alleles that are genetically identical to the parents
Answer:
the answer is B I did this last week
an oversimplified or exaggerated generalization used to describe or distinguish a group is called
Answer: An oversimplified or exaggerated generalization used to describe or distinguish a group is called a stereotype.
In a myofibril, a thick filament is composed of pairs of _____ molecules intertwined together
In a myofibril the thick filament is composed of pairs of myosin molecules that are intertwined together.
The protein myosin makes up thick filaments. Near the M line, a myosin molecule's tail joins with other myosin molecules to form the thick filament's core region, while the thick filament's heads align on either side where the thin filaments overlap. The thick and thin myofilaments that make up the myofibrils are what give the muscle its striped appearance. Along with two other muscle regulating proteins, tropomyosin and troponin, the thick filaments are made up of strands of the protein myosin, while the thin filaments are made up of strands of the protein actin.
In addition to myosin, which forms the thick filament's backbone, four additional proteins—titin, myomesin, obscurin, and myosin binding protein-C—that are tightly attached to the filament also perform crucial structural and regulatory functions.
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Select all true statements regarding gamma decay.
Gamma rays are the spectral particles with the highest energy and shortest wavelength. This form of decay does not result in the release of any particles from the nucleus.
What is a nucleus, and what does it do?The spindle holds the alleles, which are the structures that house the genetic traits, and governs and regulates the functions of the cell. The nucleoplasm is the gel-like membrane that contains the nuclear parts are suspended.
Why is the nucleus the most significant cell?Due to its role in the storage, retrieval, and copying of genetic material, the nucleus is regarded as among the most significant components of eukaryotic cells. The genetic material is housed in an organelle with two membranes.
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which of the following will increase the rate of transcription? histone acetylation leading to chromatin decompaction d. histone methylation leading to chromatin compaction removal of rna polymerase
Option C. is correct, Gene expression levels have long been known to be significantly influenced by the state of chromatin, the packaging of DNA in eukaryotes. Several chromatin-altering techniques, such as ATP-dependent remodelling.
The cell uses histone modification to control the transcription of certain genes. Since several histone acetyltransferases have been discovered and further studied in recent years, histone acetylation is one of them that is most thoroughly understood. chromatin remodelling and histone acetylation A restrictive barrier to transcription is represented by chromatin. This molecular barrier is a highly dynamic structure that can fit the complete genome's DNA inside the limits of a nucleus while yet allowing access to the genetic material stored inside.
Which of the following will increase the rate of transcription?
a. Activation of a transcriptional repressor
b. Inhibition of a transcriptional activator
c. Histone acetylation leading to chromatin decompaction
d. Histone methylation leading to chromatin compaction Removal of RNA polymerase
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size of braincase cranial shape- is the skull longer front to back? sagittal crest? sagittal keel? what is the shape of the occipital region? is there a nuchal torus? height of skull. how much skull is above the supraorbital ridge?
The modern human is thought to have the largest cranium, measuring between 120 and 1700 cubic centimetres 3. The head shrank in size and grew more compact, reaching its widest point at the base of the skull.
Brain/body size ratio = cranial capacity (in cubic centimetres). body mass (in kg) Complete the table with the specified species. Species skull capacity (cc) Body Weight Approximation on Average (kg) Body to Brain Ratio gorilla 395 54 7.31 chimpanzee 506 120 4.22 6. The scapular is extended at the suprascapular area and is shorter and broader, making it more mobile and arboreal, whereas the humeral head is rounded and globular. These faunal remains were discovered at Station 1 with the specimen at Station 2 Paleoenvironment.
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Why is less energy produced during anaerobic respiration than in aerobic respiration?
Answer:
Oxidation of glucose is incomplete
Explanation:
During anaerobic respiration the oxidation of glucose is incomplete. The reaction therefore releases much less energy – around a nineteenth of the energy released during aerobic respiration. Only two ATP molecules ofchemical energy are produced in comparison with 38 molecules in aerobic respiration.
In chloroplasts, _____ is the source of the electrons needed for photosynthesis.
Answer: In chloroplasts, water is the source of the electrons needed for photosynthesis.
Explanation:
Hope that helps
HELPPPPPPPPPPPPP helpppppppppp
Answer:
"Plasma membrane monoamine transporter (PMAT) Four phases of mitosis: prophase, metaphase, anaphase, and telophase."
PMAT is the order of the phases of mitosis.
which of the following will occur after ovulation? group of answer choices the corpus luteum prepares to become a corpus albicans. the corpus luteum secretes estrogen only. the endometrium enters its secretory phase. the secretion of anterior pituitary gonadotropins is enhanced.
The interaction of hypothalamic and anterior pituitary hormones with reproductive tissues and organ hormones regulates the human male and female reproductive cycles. In both sexes, the hypothalamus regulates and causes pituitary hormone release.
The normal menstrual cycle is a sequential event in which the hypothalamus secretes GnRH, the pituitary gland secretes follicle stimulating hormone and luteinizing hormone (LH), and the ovary responds to those hormones by recruiting a dominant follicle and secreting estradiol and inhibin A. Estradiol stimulates cervix endometrial proliferation and mucus production. A peak in estradiol causes the release of LH, which is responsible for ovulation and the subsequent secretion of progesterone by the corpus luteum, which involutionates 14 days later if not stimulated by hCG (pregnancy). Normal menstrual cycles last 28 days, with a two-day fluctuation in the same woman considered a normal pattern or a regular cycle. The normalcy of these events would allow for successful embryo implantation in the case of trying to conceive. To be fertilized, a capable spermatozoon must reach an adequate ovule during the ovulatory stage. The spermatozoon can survive for up to 5 days in the feminine genital ractum , but the ovum can only be fertilized for 12-24 hours. Fecundation takes place in the distal third of the fallopian tube, and the fecundated zygote develops into a morula before being implanted at the endometrium four days later.
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which division of the piriform cortex produces representations of the features of odorant molecules?
The anterior division of the piriform cortex produces representations of the features of odorant molecules.
Piriform cortex is a region of the brain also called as pyriform cortex, situated in the cerebrum region. Its function is to regulate the mechanisms of the olfactory experiences. It is at the junction of the temporal and frontal lobes.
Odorant molecules are the ligands that bind to the odorant receptors present at the neurons of the body involved in the olfactory responses. They are names odorants because they perceive smell. The receptors of the odorant molecules are GPCRs. Odorants are of various types based on the type of functional group they possess.
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Why are the differences between prokaryotic and eukaryotic translation of mRNA useful to humans?
For the regulation of genes during nutritional shortage and stress, development and differentiation, nervous system function, aging, and illness, translational control in eukaryotic cells is essential. Prokaryotes are able to respond quickly to environmental cues because transcription and translation happen simultaneously in the cytoplasm.
what are Prokaryotes ?Any organism without internal membranes is referred to as a prokaryote, usually written procaryote. These organisms lack a defined nucleus and other organelles.
what is eukaryotic ?eukaryotic can be explained as a living things with nuclei in their cells. Eukaryotes include all animals, all plants, all fungi, and many unicellular creatures.
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what is generally the starting material for whole-genome shotgun sequencing of genomic dna? see section 16.1
The starting material for whole-genome shotgun sequencing of genomic DNA is overlapping fragments of genomic DNA.
The DNA sequence of an organism's genome can be ascertained in a lab using shotgun sequencing. The process entails randomly dividing the genome into tiny DNA fragments that are then individually sequenced. To reconstruct the genome, a computer program searches for overlaps in the DNA sequences and uses those overlaps to put the fragments back together in the right order.
Shotgun sequencing involves randomly slicing the genome into small, sequencing-ready pieces (1 to 2 kbp in length). After being ligated into an appropriate vector, the fragments are partially sequenced. Each fragment can yield 400–500 bp of sequence in a single sequencing run.
Hence, small fragments are sequenced and organized with computer.
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NEED HELP ASAP I WILL GIVE 50 POINTS!!!
Which organisms have cells that use mitochondria to release energy stored in food?
A: Self feeders
B: Neither self feeders nor other feeders'
C: Other feeders
D: Both
Answer:
D. Both self feeders(plants) and other feeders(animals and microorganism)
Explanation:
The membrane-enclosed organelles are mitochondria, which are present in the cells of virtually all eucaryotic organisms (including fungi, animals, and plants), and plastids—most notably chloroplasts—which occur only in plants.
I hope this helped
Answer: D. Both self feeders(plants) and other feeders(animals and microorganism)
Explanation:
.
scientists understand that viruses have advanced greatly in the last 50 years. which statement gives evidence that a virus is non living.
Answer:
Reproduction.
Explanation:
One piece of evidence that a virus is non-living is that it cannot reproduce on its own.
Unlike living organisms, viruses require a host cell to replicate and produce more viruses.
This dependence on a host cell for reproduction suggests that viruses are not truly alive, as they lack one of the key characteristics of living things, which is the ability to independently sustain and replicate themselves.
