What role does Helicaase play in DNA replication?
A: Helicase connects the floating nucleotides to the template strands
B: Helicase breaks hydrogen bonds and unwinds a section of DNA.
C: Helicase checks the base pairs in each new strand of DNA.
D: Helicase bonds together pieces of DNA as new strands form.

Answers

Answer 1

Answer:

B

Explanation:

Helicase is the enzyme that unwinds the DNA by breaking hydrogen bonds between the two strands. It forms the so called replication fork.


Related Questions

the drug which is used to reduce pain is ..,....

i) opium ii) bhang iii) hashish iv) marijauna​

Answers

Answer:

hashish

Explanation:

opinum

Explanation:

because it is used to make pain nubbing/pain killer

Organizing a higher trophic levels tend to be fewer in number than those at lower tropic levels (true or false?

Answers

Answer:

True

Explanation:

How is an RNA molecule different from a DNA molecule?

RNA is single stranded and composed of nitrogenous bases, a phosphate group, and a pentose sugar.
RNA is single stranded and composed of nitrogenous bases, a phosphate group, and a tetrose sugar.
RNA is a double-stranded helix and composed of nitrogenous bases, a fatty acid, and a pentose sugar.
RNA is single stranded and composed of nitrogenous bases, an amino acid, and a hexose sugar.

Answers

Answer:

RNA is single-stranded and composed of nitrogenous bases, a phosphate group, and pentose sugar.

Explanation:

RNA is different from DNA because instead of having two matching bases; it is only made of one strand of nitrogenous bases. These bases are attached to the phosphate, which holds the whole strand of RNA together. The sugar acts as a carrier for the bases. The sugar in RNA is known as ribose and contains 5 carbon molecules. This is why it is called pentose sugar.

your body's internal feedback loops work by responding to???

A) information from the external environment

B) hormones from the pineal gland

C) changes in the internal environment

D) messages sent by the brain to body organs

Answers

Answer:

Option C

Explanation:

Which of the following is a normal process of photosynthesis that could not occur if all reaction centers were inactivated by a toxin?
A. donation of excited electrons by chlorophyll a to a primary electron acceptor
B. absorption of photons by chlorophyll b
C. absorption of photons by carotenoids
D. donation of excited electrons by chlorophyll b to a primary electron acceptor

Answers

Answer:

A. donation of excited electrons by chlorophyll a to a primary electron acceptor

Explanation:

Photosystems are structures located at the thylakoid membrane that act to harvest energy light in order to convert it into chemical energy. Each photosystem is composed of a light-harvesting complex and a core complex, which in turn is composed of a reaction center. The photosynthetic reaction centers are multi-protein complexes that use light energy to catalyze the electron transfer across the chloroplast thylakoid membrane against a thermodynamic gradient. Moreover, antenna pigments are pigments that capture the energy from photons in order to transfer energy to other pigments in the photosystem (e.g., chlorophyll B and carotenes are antenna pigments, whereas chlorophyll A is the core pigment). Light energy absorbed by antenna pigments in the photosystems is transferred to the reaction center chlorophyll A molecules, thereby exiting electrons in the reaction center. A reaction center consists of two chlorophyll A molecules, which donate electrons to the primary electron acceptor.

What organelle must be present for a cell to be classified as eukaryotic?

nucleus

chromosomes

chloroplasts

ribosomes

Answers

Nucleus
Hope this helps *smiles*
The answer is nucleus.

Which of the following diseases is not caused by viruses?

Measles
Chickenpox
AIDS
Malaria

Answers

Answer:

malaria isn't caused by bacteria

Briefly explain what happens during Meosis 1.

Answers

Answer:

Explanation:

During meiosis one cell, divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes of the parent cell.  they are haploid. Meiosis produces our sex cells or gametes. (eggs in females and sperm in males)

Which of these is an example of an adaptive )or specific) immune response

Answers

Adaptive immunity is defined by two important characteristics: specificity and memory. Specificity refers to the adaptive immune system's ability to target specific pathogens, and memory refers to its ability to quickly respond to pathogens to which it has previously been exposed.
___IgD: B. This class of antibody is the first to appear after activation of B cells
___IgM: E. This class of antibody is not secreted by B cells but is expressed on the s...
___IgE: C. This class of antibody is involved in the defense against parasitic infections ...
___IgA: A. This class of antibody is the only one that can cross the placenta

What questions do you have about skin and skin color?

Answers

Answer:

nothing I have☺️☺️☺️☺️☺️☺️☺️☺️☺️

During respiration, carbon dioxide diffuses from the blood across the alveolus and into the lungs. Which factor increases the diffusion rate of carbon dioxide?

Answers

Explanation:

There are some factors which affect the rate of diffusion. These are:-

The partial pressure of oxygen.

The partial pressure of carbon dioxide.

Temperature.

The concentration of gases.

The thickness of the membrane.

hope this helps you

have a nice day :)

Answer:

the thickness of membrane

(ii) Fish use their gills as a gas exchange surface.
Suggest three ways in which fish gills are adapted for efficient gas exchange.
(3)
1
2
3

Answers

Exchange of gases in fish is very efficient because of: the large surface area of the gills. the large surface area of the blood capillaries in each gill filament. the short distance required for diffusion – the outer layer of the gill filaments and the capillary walls are just one cell thick.

Since the reason of the large surface area of the gills, gas exchange in fish is very efficient. the blood capillaries' large surface area in each gill filament The outer layer of the gill filaments as well as the capillary walls are only one cell thick due to the short distance required for diffusion.

What are gills?

A gill is a respiratory organ found in many aquatic organisms that allows them to extract dissolved oxygen from water and expel carbon dioxide.

Some species' gills, such as hermit crabs, have adapted to allow them to breathe on land as long as they are kept moist.

Water runs over the gills as the fish opens its mouth, and blood in the capillaries picks up oxygen dissolved in the water. The blood then circulates through the fish's body to deliver oxygen, just as it does in humans.

Fish have gills, which allow them to "breathe" oxygen from the water. Water enters the mouth, travels through the gills, and exits the body via a special opening.

As the water passes over them, the gills absorb oxygen from it. The body of a fish is stream-lined.

Thus, these are the ways, in which fish gills are adapted for efficient gas exchange.

For more details regarding gills, visit:

https://brainly.com/question/14793690

#SPJ2

What is the process in genetic expression?

Answers

Answer:

Explanation:

Gene expression is the process by which the instructions in our DNA are converted into a functional product, such as a protein. It acts as both an on/off switch to control when proteins are made and also a volume control that increases or decreases the amount of proteins made.

How do the frequencies of the waves compare?

Wave A has a higher frequency because it has a larger amplitude.
Wave A has a lower frequency because it has a longer wavelength.
The waves have the same frequency because they have the same wavelength.
The waves have the same frequency because they have the same amplitude.

Answers

Answer:

The waves have the same frequency because they have the same amplitude.

Select the correct answer.
Why do plants excrete more carbon dioxide at night than during the day?
A.
Cellular respiration occurs only at night and not during the day.
B.
Cellular respiration occurs at a faster rate at night than during the day.
C.
Photosynthesis uses some of the carbon dioxide released during the day.
D.
The light-independent reaction of photosynthesis that releases carbon dioxide occurs at night.

Answers

Answer:

D

Explanation:

because they cannot do photosynthesis at night.

Answer:

The answer is C. Photosynthesis uses some of the carbon dioxide released during the day.

Explanation:

List three of water’s unique properties.

Answers

Explanation:

1.water is called universal solvent it can dissolve almost every solute on it

2.water can show anamolus expansion which mean it density will me most on 4 degree celsius

3.it is neutral substance

universal solvent, water cane expand, neutral substance

__________ will increase soil nitrates, while ___________ will decrease soil nitrates.
A. Fast growing crops, heavy rains
B. Decomposers, lightning
C. Animal manure, fast growing crops
D. Denitrifying bacteria, Nitrifying bacteria

Answers

Answer:

A. Fast growing crops, heavy rains

Explanation:

Fast growing crops will increase soil nitrates, while heavy rains will decrease soil nitrates.

Animal manure has organic waste containing nitrogen that acts as a source of nitrate in the soil and growing crops absorb nitrate from the soil. Thus option C is correct.

What is nitrate?

Nitrate is an organic compound of nitrogen that is present in the fertile soil and absorbed by the plants. The Source of nitrate is humus and fertilizer. Humus is obtained from animal manure, and dead and decaying animal and plant bodies.

Fast-growing crops absorb the nitrate from the soil and use it for development and growth such that nitrate decrese in soil. So option C is correct.

Learn more about nitrate, here:

https://brainly.com/question/1615727

#SPJ5

Identify the incorrect statement regarding the fundamental causes of edema. Multiple Choice Capillary reabsorption does not depend on oncotic pressure. A deficiency of albumin (hypoproteinemia) produces edema by reducing the reabsorption of tissue fluid. Kidney failure leads to water retention and hypertension, thus raising capillary blood pressure and filtration rate. Obstruction of lymphatic vessels can interfere with fluid drainage and lead to the accumulation of tissue fluid distal to the obstruction. Since albumin is produced by the liver, liver diseases, such as cirrhosis, tend to lead to hypoproteinemia and edema.

Answers

Answer:

Capillary reabsorption does not depend on oncotic pressure

Explanation:

Edema refers to the swelling caused by the fluids trapped in the body's tissues, which swell from injury and/or inflammation. Edema can be associated with the decrease in plasma oncotic pressure, i.e., osmotic pressure exerted by proteins (especially albumin) in the blood vessel's plasma, the increase in hydrostatic pressure, or the increase in the capillary permeability. Moreover, capillary reabsorption refers to the movement of fluid from interstitial space to the capillaries, which is driven by the blood colloidal osmotic pressure. Lymphatic obstruction, i.e., the blockage of the lymph vessels that drain fluids from tissues, may cause edema in the part that is drained by the affected vessels (it is known as lymphedema). Moreover, liver/kidney failure may lead to edema by decreasing albumin and oncotic pressure. When plasma albumin levels drop because of liver diseases, the colloid osmotic pressure also decreases. In consequence, liver diseases, including stage 3 cirrhosis, lead to the development of swelling in the abdomen, thereby leading to edema.

external structure of Amoeba​

Answers

Answer:

Structure of amoeba primarily encompasses 3 parts – the cytoplasm, plasma membrane and the nucleus. The cytoplasm can be differentiated into 2 layers – the outer ectoplasm and the inner endoplasm. The plasma membrane is a very thin, double-layered membrane composed of protein and lipid molecules.

Explanation:

In this assignment, you will expand your knowledge of muscle structure and function by exploring muscle strength and contraction. Then, you will use what you learn to answer some follow-up questions.

Read the article and use the information to answer the following questions.

Strongest Muscle

Name the four ways muscle strength can be measured and briefly describe each.

Answers

Answer:

Absolute strength measures maximum force.

Dynamic strength measures repeated motions.

Elastic strength measures exertion of force rapidly.

Strength endurance measures fatigue resistance.

Explanation:

im megaminds child

Absolute strength measures maximum force. Dynamic strength measures repeated motions. Elastic strength measures exertion of force rapidly. and Strength endurance measures fatigue resistance.

What is Muscle strength ?

Physical strength and muscular endurance share some characteristics, they also differ significantly. Your ability to apply force or lift weights is a measure of your muscular strength. Using heavier weights for fewer repetitions helps develop muscular strength.

The term "muscular endurance" describes a muscle's capacity to endure prolonged periods of repeated contractions against opposition.

Long-distance running, cycling, or swimming, as well as bodyweight exercises and circuit training, are exercises that increase muscle endurance.

To learn more about Muscle, refer to the link:

https://brainly.com/question/9883108

#SPJ3

What do you mean by photosynthesis?


bore D D D D ​

Answers

Answer:

photosynthesis is the process in which plant make food by themselves from using sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Answer:

Photosynthesis is a process through which plants and other organisms transform light energy into chemical energy, which is then released to power the organism's metabolic processes through cellular respiration.

OAmalOHopeO :)

1 Reproduction is an important characteristic of living organisms.Explain

Answers

Answer:

Reproduction is one of the most important characteristics of living beings, because -

- The existence of any species is dependent on the reproduction because no living being is immortal.

After death of a being of one generation,the existence of that died being is completed by the newborns of the next generation.

And,the birth of newborns of next generation is only possible by the reproduction.

- The variation and mutation in the biological characteristics is often necessary which is only possible by reproduction through many generations.

- When a living being becomes old, it's become unable to do normal tasks like collection of food, finding shelter etc,at that moment,the newborns of next generation do the necessary jobs.

And as mentioned before,these newborns are only possible due to reproduction.

Chemosynthesis _______. Question 11 options: uses energy derived from hydrocarbons and hydrogen sulfide in place of solar energy produces carbohydrates and sugars occurs around hydrothermal vents near the oceanic ridge system Both a and c are correct. All of the above are correct.

Answers

Answer:

The answer is all of the above are correct.

Explanation:

Chemosynthesis occurs in bacteria and other organisms and involves the use of energy released by inorganic chemical reactions to produce food. All chemosynthetic organisms use energy released by chemical reactions to make a sugar, but different species use different pathways. For example, at hydrothermal vents, bacteria oxidize hydrogen sulfide and add carbon dioxide and oxygen to produce sugar, sulfur, and water:  

CO2 + 4H2S + O2 ⇒ CH20 + 4S + 3H2O.

Chemosynthesis is the process by which food (glucose) is made by bacteria using chemicals as the energy source, rather than sunlight. Chemosynthesis occurs around hydrothermal vents and methane seeps in the deep sea where sunlight is absent. During chemosynthesis, bacteria living on the seafloor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in seawater). Pure sulfur and sulfur compounds are produced as by-products.

Complete the table by filling in the missing information. Use these choices:

frameshift
substitution


7. UGU-CCG-GAA-CGA

UGC-CGG-GAA-CGA

8. GAA-CGU-AGC-GGU

GAU-CGU-AGC-GGU

9. UGU-UUC-CCU-UAA

UGU-UCC-CUU-AA

Answers

Answer:

7. Substitution mutation

8. Substitution mutation

9. Frameshift mutation

Explanation:

A substitution mutation is any kind of mutation that involves replacement of one or more nucleotide base by another in a sequence.

A frameshift mutation, on the other hand, is a mutation that changes the reading frame of the sequence. Two types of mutations cause frameshift viz: insertion and deletion mutation.

In the following sequences, mutation has occured as follows:

7. UGU-CCG-GAA-CGA to UGC-CGG-GAA-CGA - Substitution mutation has occured because nucleotides C and G has replaced C and U in the first and second codons respectively.

8. GAA-CGU-AGC-GGU to GAU-CGU-AGC-GGU- A substitution mutation because nucleotide U has replaced A in the first codon.

9. UGU-UUC-CCU-UAA to UGU-UCC-CUU-AA - A frameshift mutation because nucleotide U has been removed from the second codon, hence, causing a change in the reading frame.

Neurons are best described as:

Answers

Answer:

neutral?

Explanation:

Which of the following is a heterotroph?
*cyanobacteria
*gopher
*fir tree
*dandelion

Answers

Correct Answer is gopher

Help please asap help me

Answers

Answer: cells, chlorophyll, nucleus, chromosomes, organelles, interphase, endoplasmic

What cycle of replication is used by the common cold virus?
A: Dormant cycle
B: Replication cycle
C: Lytic cycle
D: Lysogenic cycle

Answers

Answer:

C

Explanation:

The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell. The lysogenic cycle involves the incorporation of the viral genome into the host cell genome, infecting it from within.

The common cold virus is replicated using the lytic cycle, by introducing its genome into the host and using its cellular machinery, hence option c is correct.

How common cold virus replicate?

The common cold virus is replicated by using the lytic cycle, in which the virus introduces its genome into the host genome and uses all the replicating machinery of the virus.

The lysogenic cycle is different from the lytic cycle in which the viral genome replicates on its own and does not integrate its genome into the host genome.

After replicating its genome with the host genome, the viral genome is excised from the host genome and assembled into new viral particles for infecting other host cells. The new viral particle lysed the host cell and spread to other cells.

Therefore lytic cycle is used by the common cold virus, hence option c is correct.

Learn more about replication in common cold virus, here:

https://brainly.com/question/12785874

#SPJ2

Within the Phylum Mollusca, what is the
radula?
A. the organ that grinds up food before digestion
B. the organ that turns into the shell of the animals
C. the organ that circulates blood through the organism

Answers

Answer:

I think the ans is no.a ok

please mark as brainliest

How do I make a Punnet Square without knowing if traits are Dominant or Recessive? I cannot refer to the parents of the current generation, so I have to rely on that generation to create a theoretical next generation.

Answers

If you are referring to a previous generation, that would probably mean that the traits they have are the dominant ones

Explanation:

if you know all the traits possible, then the ones the parents have of a previous generation are most likely the dominant ones, from there, you can hopefully figure out another generation. could you attach a picture if this didn't help? thanks

Other Questions
What is a country, person, or company that uses exploitation for production or consumption? Solve this problem: 5X +8 = 53 mt oto ang chy vi vn tc l 10m/s th tng tc v chuyn ng nhanh dn u sau 20s th t vn tc 14m/s a) tnh gia tc ca xeb) tnh vn tc xe sau 40s k t khi tng tc v qung ng xe i c trong thi gian Do you know the reason______ 006 was killed?a. whenb. wherec. whyd. which The Lumber Division of Paul Bunyon Homes Inc. produces and sells lumber that can be sold to outside customers or within the company to the Construction Division. The following data have been gathered for the coming period:Lumber Division:Capacity200,000 board feetPrice per board foot$2.50Variable production cost per bd. ft.$1.25Variable selling cost per bd. ft.$0.50Construction Division:Board feet needed60,000Outside price paid per bd. ft.$2.00If the Lumber Division sells to the Construction Division, $0.35 per board foot can be saved in shipping costs.If current outside sales are 130,000 board feet, what is the minimum transfer price that the Lumber Division could accept?a. $1.25b. $1.40c. $1.75d. $2.50 I NEEED HELP IN PHYSICS PLEASE! What do you mean folk culture? SOMEONE HELP ME PLEASE will give brainlest pls help me with all three questions A sample of 42 observations is selected from one population with a population standard deviation of 3.3. The sample mean is 101.0. A sample of 53 observations is selected from a second population with a population standard deviation of 3.6. The sample mean is 99.0. Conduct the following test of hypothesis using the 0.04 significance level.H0 : 1 = 2H1 : 1 2a. State the decision rule.b. Compute the value of the test statistic. c. What is your decision regarding H0?d. What is the p-value? help needed asap please :( Find the distance of the point (4,4,4) from the line r(t)=1+2t,1+2t,33t. BC5CA12Find the length of c usingthe Pythagorean Theorem.Enter Which of the following statements about dinoflagellates is true? Select one: A. All known varieties are autotrophic. B. Their walls are usually composed of silica plates. C. Many types lack mitochondria. D. Some produce toxic agents in the water E. Their dead cells accumulate on the seafloor, and are mined to serve as a filtering material. Does the verbal description c minus 12 Required information A bank reconciliation proves the accuracy of the depositor's and the bank's records. The bank statement balance is adjusted for items such as outstanding checks and unrecorded deposits made on or before the bank statement date but not reflected on the statement. The book balance is adjusted for items such as service charges, bank collections for the depositor, and interest earned on the account. The company's bank reconciliation at June 30 included interest earned in the amount of $150. Complete the necessary journal entry . The math teacher and cheerleading coach have teamed up to help the students do better on their math test. The cheer coach, using dance move names for the positioning of their arms, yells out polynomial functions with different degrees.For each position the coach yells out, write the shape by describing the position of your left and right arm.a1. Constant Function:a2. Positive Linear Function:a3. Negative Linear Function:a4. Positive Quadratic Function:a5. Negative Quadratic Function:a6. Positive Cubic Function:a7. Negative Cubic Function:a8. Positive Quartic Function:a9. Negative Quartic Function:When it comes time to take the test not only do the students have to describe the shape of the polynomial function, you have to find the number of positive and negative real zeros, including complex. Use the equation below:[tex]f(x)=x^5-3x^4-5x^3+5x^2-6x+8[/tex]b. Identify all possible rational zeros.c. How many possible positive real zeros are there? How many possible negative real zeros? How many possible complex zeros?d. Graph the polynomial to approximate the zeros. What are the rational zeros? Use synthetic division to verify these are correct.e. Write the polynomial in factor form.f. What are the complex zeros? Financial information for Forever 18 includes the following selected data: ($ in millions except share data) 2021 2020 Net income $ 160 $ 171 Dividends on preferred stock $ 22 $ 17 Average shares outstanding (in millions) 250 300 Stock price $ 11.92 $ 10.87 Required: 1-a. Calculate earnings per share in 2020 and 2021. An end-user license agreement protects _____. What is the 11th term of this geometric sequence?: 16384, 8192, 4096, 2048