Which of the following is/are TRUE about a cell’s plasma membrane? (CHOOSE ALL THAT APPLY.)
Question 3 options:
Plant cells have a cell wall instead of a plasma membrane.
Proteins are embedded in the plasma membrane and contribute to its function.
The exterior of a phospholipid bilayer is hydrophilic, and the interior is hydrophobic (see figure above).
The plasma membrane regulates the movement of molecules and ions into and out of the cell.
Answers
Answer:
The plasma membrane regulates the movement of molecules and ions into and out of the cell.
Explanation:
Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike prokaryotes, eukaryotic cells also possess internal membranes that encase their organelles and control the exchange of essential cell components. Both types of membranes have a specialized structure that facilitates their gatekeeping function.
The true statement about a cell’s plasma membrane is that the plasma membrane regulates the movement of molecules and ions into and out of the cell. The correct option is D.
What is a plasma membrane?The plasma membrane or cell membrane is the outer covering of the cell. It is made up of lipids and proteins. Cell membranes serve to separate and group cells. Every cell has an exterior plasma membrane that controls both what and how much of any given material enters the cell.
Eukaryotic cells, unlike prokaryotes, have internal membranes that enclose their organelles and regulate the exchange of vital cell components. Both kinds of membranes have a unique structure that makes it easier for them to perform the gatekeeping job.
Thus, the correct option is D. The plasma membrane regulates the movement of molecules and ions into and out of the cell.
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Related Questions
what are real-life (small) examples of smooth er, rough er, RNA, and ribosomes?
I'll give brainliest
Answers
Answer:
preparing a surface of painting
Explanation:
painters spray down the exterior of a house with ribosomes before applying the first coat,so the paint will stick better.
Explanation:
Real life example: ribosomes
A "real life example" would be, a car factory. Car instructions go in (mRNA), car parts put together (amino acid chain) then completed cars leave (proteins)
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8. At the surface of a swimming pool a 2.0 L balloon is under 760 mmHg of pressure. If that balloon is taken to the
bottom of the deep end, the pressure is now 950 mmHg. What is the new volume of the balloon?
0.45 L
b. 1.6L
2.4 L
d. 95 L
a.
C.
voru
Answers
The new volume of the balloon is 1.6L
HOW TO CALCULATE THE FINAL VOLUME:
Using Boyle's law, which states that the pressure of a given gas is inversely proportional to its volume i.e PV = KBoyle's law equation is as follows:
P1V1= P2V2
Where;
P1 = initial pressure (mmHg)P2 = final pressure (mmHg)V1 = initial volume (L)V2 = final volume (L)According to this question,
P1 = 760mmHg
V1 = 2L
V2 = ?
P2 = 950mmHg
Using P1V1 = P2V2
760 × 2 = 950 × V2
1520 = 950V2
V2 = 1520/950
V2 = 1.6L
Therefore, the new volume of the balloon is 1.6L
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Determine the percent increase per year from 1999 to 2004
Answers
Answer:
Hey bud, I saw this was your first question. You need to attach some files to your question in order for us to see it. You can do that by using the Paperclip shaped icon on the bottom when you are making a question.
Explanation:
10.9) Are humans ectotherms?
If not, what are they?
Answers
Answer:
no they arent
Explanation:
they are endotherms
Compared to developing nations, developed nations have
a. lower health standards
b.greater wealth.
c. faster-growing populations.
d. less social services.
Answers
Answer:
b greater wealth is the correct option.
What is it about red that makes bulls so angry?
Answers
Answer:
It isn't the red that gets bulls mad. They are colorblind. It is the movements of the cloth that irritates them!
Explanation:
5 puntos
5. Si el color de ojos negros es dominante (A) sobre el color de ojos azul
(a). El fenotipo y el genotipo que tendríamos al cruzar dos personas
heterocigotas es
*
GENOTIPO: 50% Heterocigotas - 25% homocigotas dominantes - 25% homocigotas
recesivas.FENOTIPO: 75% ojos negros - 25% ojos azules
GENOTIPO: 100% Heterocigotas. FENOTIPO: 100% ojos negros.
GENOTIPO: 50% Heterocigotas - 50% homocigota recesivo. FENOTIPO: 100% ojos
negros.
GENOTIPO: 50% Heterocigotas - 50% homocigotas dominantes FENOTIPO: 50% ojos
negros - 50% ojos azules
Answers
Answer:
GENOTIPO: 50% Heterocigotas - 50% homocigota recesivo. FENOTIPO: 100% ojos
Explanation:
No se de la verdad
Roberto wants to measure the lengths of the sides of a metal cube. Which tool should he use?
Answer: ✔ Ruler
To make a solution, Sian must measure 15.0 mL water. Which tool should she use?
Answer: ✔ graduated cylinder
An experimental procedure calls for 35.9 g sodium chloride and 15.2 g silver nitrate. What tool should be used to measure these substances?
answer: ✔ electronic balance
Mark needs to determine how much the temperature of a solution changes during a chemical reaction. Which tool does he need?
Answer: ✔ thermometer
I was struggling to find the answers for these questions. So decided to put the questions along with the right answers for the people that might need it
feel free to answer if you need the points or if you just want to say something.
this is for Edg 2021
Answers
Answer:
Roberto wants to measure the lengths of the sides of a metal cube. Which tool should he use?
✔ ruler
To make a solution, Sian must measure 15.0 mL water. Which tool should she use?
✔ graduated cylinder
An experimental procedure calls for 35.9 g sodium chloride and 15.2 g silver nitrate. What tool should be used to measure these substances?
✔ electronic balance
Mark needs to determine how much the temperature of a solution changes during a chemical reaction. Which tool does he need?
✔ thermometer
Explanation:
How are impulses received to the brain? Step-by-step???
Answers
So, impulses are basically reactions from something else. So, in the brain, there are neurons, which are also known as brain cells. They have two main and really important parts, called the dendrite and the axon. The dendrite receives the impulse, either from the central nervous system (CNS) or from the peripheral nervous system (PNS). After this event, the axon transfers and carries the impulse away from the cell body. Also, the impulse travels through a little gap in between neurons called the synapse, before the impulse travels to the next neuron. And, remember, this process is not slow. This process occurs in a matter of milliseconds. Think about it. If you burn your hand from something really hot, you will react to that really fast as an impulse. Millions of neurons will react to that in just a second. That's why science is so cool. It has so many interesting topics and fascinating facts, like this. Anyways, I hope this helped you. Enjoy your day.
Dendrites get impulses. Axons carry impulses.
A cat jumped off a shelf. It has 40 Joules of Mechanical Energy and 16 Joules of Kinetic Energy. What is the Potential Energy? (ENTER THE NUMERICAL VALUE ONLY)
Answers
Answer:
24 Joules
Explanation:
The formula is mechanical energy = kinetic energy + potential energy. So in order to find the potential energy you will need to reverse it.
Mechanical energy- Kinetic energy= Potential energy.
40- 16= 24
Answer: 24 Jolues.
Hope this helps!
the foot is ___ to the nose
Answers
Answer:
below
Explanation:
what are the options?
how many organelles are there in a cell. What are their names and what do they do. I am keeping notes
Answers
Answer:
Nucleus - controls all activities of the cell
Nucleolus (in the middle of the nucleus)
- the synthesis of ribosomes and RNA (ribonucleic acid)
Mitochondria (battery of cell) - oxidise glucose to release energy in the form of ATP ( adenosine triphosphate)
Edoplasmic reticulum
1. Smooth - synthesises lipids
2. Rough- Transport proteins synthesised by ribosomes
Golgi apparatus ( golgi body, or any golgi, is has many names)
- Acts as Centre for processing, packaging and transporting macromolecules such as proteins and carbohydratez
Ribosomes - sites of protein synthesis
Lysosomes- Break down macromolecules such as proteins, lipids etc
Vacuoles - store food substances, site for waste products
Centrioles - form spindle fibres during cell division
Cytoplasm ( the so call empty spaces in the cell)
- place where biochemical reactions occur
Plasma membrane
-control movement of substances in and out of the cell due to its semi permeable characteristics
Ok that's all for animal cells, but for plants cells, there is more
Cloroplast - site for photosynthesis
Cell wall - Maintains the shape of plant call, give support to cells
What is the rule for making a atom positive/+ion?
Answers
Answer:
Ions are formed when the number of protons in an atom does not equal the number of electrons. If more protons are present, the ion is positive and is known as a cation; if more electrons are present, the ion is negative and referred to as an anion.
Explanation:
YA'LL ARE SMART ! PLEASE HELP !
Answers
Answer:
ionic dont belive me here u go for some help to thangs
Explanation:
i hoped i help all i can
51. Evaluate each of the following, and write the answer to
the correct number of significant figures.
a. 97.381 + 4.2502 + 0.99195
b. 171.5 + 72.915 – 8.23
c. 1.00914 + 0.87104 + 1.2012
d. 21.901 – 13.21 - 4.0215
Answers
An analogous structure is one that:
A. comes from a common ancestor, but now has a different function.
B. has exactly a 4 bone type structure, including upper arm, forearm, wrist, and hand/foot.
C. has the same function in multiple organisms but evolved independently each time, without a common
ancestor.
D. no longer serves a function.
Answers
Answer:a
Explanation:a
An analogous structure is one that has the same function in multiple organisms but evolved independently each time, without a common ancestor. The correct option is C.
What are analogous organs?Analogous organs are those organs that are different in different organisms and have grown in different times and have nothing in common, but they function similarly. The animals are anatomically very different, but some organs have the same functions.
Examples of analogous organs are:
The wings of a bat, a bird, and an insect.The fin of a dolphin and a shark.Sweet potato and potato.Thus, the correct option is C. has the same function in multiple organisms but evolved independently each time, without a common ancestor.
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What is the name of the valve that keeps blood from flowing backward into the left ventricle?
Answers
When the left ventricle is full, the mitral valve closes and keeps blood from flowing backward into the left atrium when the ventricle contracts.
The Science of Biology: Question 1: Explain how sunlight is the primary source of energy for your own life? Question 2: In terms of energy, what is the difference between glucose and ATP? Question 3: Explain the role of a hypothesis in a scientific investigation? ( Will Mark Brainliest if correct).
Answers
Answer:
cause sunlight is the basic source of energy which is used in our daily life
Explanation:
sunlight is the main source of energy for the earth. without sum nothing is possible . sunlight is relatable in every systematic flow. like wise in photosynthesis, life cyle,drying food or fruits ,etc. moreover!
What enzyme breaks down starch in your saliva?
pepsin
trypsin
lipase
amylase
Answers
Answer:
D
Explanation:
It is the amylase, or rather alpha-amylase
A group of scientists must complete a study, but they have limited funding from a government organization. What practical ways could these scientists work around this limitation? Check all that apply.
Answers
Answer: You can consult:
One solution is to limit the scope of the study. Another possibility
is do several smaller studies over a longer period of time.
Explanation:
I'm not sure but hope it helps.
Name the main energy-
storing products of each
phase of photosynthesis.
Answers
Answer:
Rubisco
Explanation:
How is biotechnology useful for society?
Answers
Answer:
Like all technologies, biotechnology offers the potential of enormous benefit but also potential risks.
Biotechnology could help address many global problems, such as climate change, an aging society, food security, energy security and infectious diseases, to name just a few.
HOPE IT HELPS!!
All of these substances are found in the cell membrane except
phospholipids
cholesterol
transport proteins
ribosomes
Answers
Answer:
ribosomes
Explanation:
What does the term "environment" describe?
The air, water, and land where something lives
O The physical space that matter takes up
O How quickly things grow
O The type of nutrients needed in soil
Answers
Answer:
The air, water, and land where something lives
Explanation:
Answer:
The air, water, and land where something lives
Explanation:
Environment is described as the surroundings and/or the conditions in which a living organism lives.
hope this helps! if you have any questions, let me know!
Reflection:
What challenges do you envision that would hinder the progress of a flipped
classroom?
Answers
Answer:
Explanation:
Need to Know. How are you creating a need to know the content that is recorded? Just because I record something, or use a recorded material, does not mean that my students will want to watch, nor see the relevance in watching it.
Engaging Models. One of the best way to create the "need to know" is to use a pedagogical model that demands this. Whether project-based learning (PBL), game-based learning (GBL), Understanding by Design (UbD), or authentic literacy, find an effective model to institute in your classroom.
Technology. What technology do you have to support the flipped classroom? What technology gaps exist that might hinder it? Since the flipped classroom is about recorded video, then obviously students would need the technology to do this.
Reflection. Every time you have students watch a video, just like you would with any instruction
What do scientists call a gavitationally bound system of two stars in which
both stars can be seen with a telescope?
Answers
Answer:
Visual binaries are two stars with a wide enough separation that both can be viewed through a telescope, or even with a pair of binoculars. Five to 10 percent of visible stars are visual binaries. Spectroscopic binaries appear close even when viewed through a telescope.
Explanation:
pls mark brainliest
what does it mean when an emission line of helium from a galaxy is shifted toward red
A. The galaxy contains a small percent of Hydrogen
B. The Galaxy is moving toward the viewer
C. The galaxy is moving away from the viewer
D. The galaxy contains a large percent of hydrogen
Answers
Answer:
the answer is the galaxy is moving away from the viewer! lemme know if you need the rest of the answers or anymore help
Explanation:
i took the test :)
When an emission line of helium from a galaxy is shifted toward red, it means that the galaxy is moving away from the viewer. Thus, the correct option is C.
What is Galaxy?The Galaxy may be defined as a tremendous collection of dust, gas, dark matter, and billions of stars and their solar systems, all held together by gravity.
When it is shifted toward red, it describes the displacement of an emission line of helium from a galaxy to longer wavelengths. This alteration is interpreted as a doppler shift.
It depends on the location of any celestial body in a galaxy. The farther from us a star is, the more its light has shifted towards the red end of the visible spectrum.
Therefore, when an emission line of helium from a galaxy is shifted toward red, it means that the galaxy is moving away from the viewer. Thus, the correct option is C.
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Enzymes are typically fibrous proteins.
True
False
Answers
Explanation:
Enzymes are typically globular proteins.
Enzymes are mainly globular proteins - protein molecules where the tertiary structure has given the molecule a generally rounded, ball shape (although perhaps a very squashed ball in some cases). The other type of proteins (fibrous proteins) have long thin structures and are found in tissues like muscle and hair.
please solve all the questions.
Answers
Answer:
the duty of each of the professionals are:
Explanation:
1)junior technician of plants science
=to research about plants and give information to all the world
2)ranger
=to protect a forest or a certain place
3)forester
=to keep an eye on the forest and keep forest safe
4)jt of food and dairy products
=to research for food and give information about things related
Moosehead Lake in Maine is a beautiful lake, spanning 74,890 acres with a maximum depth of 246 feet. The most sought-after fish to be found in Moosehead Lake are: Landlocked salmon, lake trout, brook trout, and burbot. According to Tim Obrey, a regional fisheries biologist with the Maine Department of Inland Fisheries and Wildlife, the fishing at Moosehead declined from phenomenal to just "really good" during the late 1980s, but has rebounded due to careful management. This table shows the populations of three major fish in Moosehead Lake over a 30 year period. Moosehead Lake was illegally stocked with smallmouth bass in 1970. Fish Populations in Moosehead Lake Year Smallmouth Bass Salmon Lake Trout
Smelts are the primary food source for lake trout and salmon in Moosehead. In the late 1980s, we documented a dramatic increase in the abundance of wild lake trout in Moosehead Lake. Swelling lake trout numbers taxed the forage base and the smelt population took a dive. What would be appropriate action for Wildlife Management to make to correct the problem? Choose ALL that apply.
B) One hundred small, one-hectare size areas should be conserved
C) Native species should be maintained or planted within the greenspace to promote biodiversity.
D) Exotic species should be cultivated and planted to increase biodiversity in the protected greenspace.
E) The majority of the secondary consumers should be removed from the greenspaces to promote an increase in lower levels of the food chain.
(WILL GIVE BRAINLIEST WHOEVER CAN ANSWER RIGHT!!!!!!)
Answers
When one of the trophic web links disappears, it affects the whole chain. In management programs it is important to consider these consequences to keep the whole ecosystem equilibrium. In the exposed situation, Native species should be maintained or planted within the greenspace to promote biodiversity and The majority of the secondary consumers should be removed from the greenspaces to promote an increase in lower levels of the food chain.
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The trophic chain is the energy transference process that involves different organisms, from autotroph or producers, to the consumers or decomposers.
The disappearance of one link affects the whole system. The direct superior link does not have enough food supply, while the immediately anterior link is beneficiated for not being eaten by its predator. And finally, as this last link will overgrow, it will consume greater quantities of its food, causing a decrease in its anterior link. Top-down control refers to scenarios where superior predators control the structure and dynamic of an ecosystem.
It is necessary and significant to consider these modifications in the whole ecosystem while planning management actions to keep an equilibrium.
In the exposed example we know that the most wanted species are
Landlocked salmon, lake trout → which increased its population size sharply over the last yearsbrook trout, and burbotSmelts, which are the primary food source for lake trout and salmon, decreased in population size significantly.
Finally we know that smallmouth bass was introduced in 1970.
This information suggests that the decrease in smelts' population is due to the predation of the species by the lake trout, which population increased sharply in size. The change on smelts' population size, might affect the blook trout and salmon populations, that also feed on semelts, and might also affect other species occupying inferior levels.
When implementing a management program, it would be necessary to promote biodiversity by growing native species in greenspaces and ensure their survival and reproductive succes. In the exposed case, it is necessary to preserve smelts' population, so it would be also necessary to remove from these green spaces the secondary consumers -trouts and salmon- that feed on them, to ensure the smelts' population growth and recovery.
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Answer:
The Answer is A, C, and D
Explanation:
Wildlife management reacted to the increase in trout and depletion of smelt by liberalizing bag limits on lake trout and allowing harvest of smaller fish. We also severely reduced the salmon stocking rates. Salmon and trout populations had to be controlled until smelt could rebound.
