1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
miskamm [114]
3 years ago
5

Choose the best answer that makes the sentence correct. A membrane that allows only some materials to move in and out of the cel

l is _____.
A. permeable

B. semipermeable

C. rigid

D. bilayered
Biology
2 answers:
nasty-shy [4]3 years ago
8 0
A membrane that allows only some materials to move in and out of the cell is B. Semipermeable.
Juliette [100K]3 years ago
6 0
<span>B. semipermeable

</span>The membrane<span> is </span>selectively permeable<span> because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen </span>can<span> cross the </span>membrane<span>. Many large molecules (such as glucose and other sugars) cannot. Water </span>can pass through<span> between the lipids.</span>
You might be interested in
Explain the four steps of how enzymes work
viktelen [127]
Speed. Reaction. Function. Alter.
3 0
3 years ago
Which is the result of meiosis II? A. two diploid daughter cells B. four diploid daughter cells C. two haploid daughter cells D.
snow_tiger [21]

The answer to your question is,

D. Four haploid daughter cells.

-Mabel <3

7 0
3 years ago
Read 2 more answers
Which kind of organism is found at the end of a food chain?
ad-work [718]

Answer:

A decomposer is found at the end of a food chain.

3 0
2 years ago
Read 2 more answers
Which statements about the production of ATP ATP in chloroplasts are true? The production of ATP ATP in chloroplasts does not re
Lostsunrise [7]

Answer:

A proton gradient is generated by the transport of protons into the thylakoid lumen.

Protons move from the thylakoid lumen to the stroma through ATP synthase, producing ATP.

Explanation:

During photosynthesis, the environment is made acidic inside the lumen i.e. H⁺ are pumped into thylakoid lumen from stroma as a result of which more H⁺ are present in the thylakoid lumen as compared to stroma. It happens during light dependent reaction of photosynthesis. The concentration of H⁺ is already higher in lumen and transfer of more and more H⁺ from stroma increases the concentration of H⁺ even more leading to generation of a potential gradient. These H⁺ subsequently tend to move freely from lumen to stroma via "reverse pumps known as ATP synthase". The reason why these are known as reverse pumps is because pumps usually move particles from lower to higher concentration which is an active movement i.e. not natural so such movement requires energy. Naturally particles move from higher to lower concentration gradient until the concentration becomes equal on both the sides but pumps act opposite of this natural process and move particles from lower to higher concentration and utilize energy to do it. But here H⁺ are moving from higher to lower concentration which occurs naturally so ATP synthase rather than using energy tend to generate energy and this free energy is used to generate ATP from ADP & Pi (inorganic phosphate).

4 0
2 years ago
A black swan and a white swan breed and produce offspring that are gray in color. What is the most likely explanation for this h
Andrej [43]
Codominance sudhqjeiwbdjwjsbwkdwn
8 0
2 years ago
Other questions:
  • A common pioneer organism in a succession is called the
    6·1 answer
  • What stage of cellular respiration use the high-energy electrons from NADH and FADH2 to form ATP molecules
    13·1 answer
  • Look at fig. 132 where the Punnett square shows a homozygous red grapfruit
    15·1 answer
  • Put the following stages in order: G2,G1, S, mitosis, cytokinesis.
    5·2 answers
  • Cathy hypothesized that corn would not grow in mud. To test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soi
    11·1 answer
  • All plants and animals in a food chain use energy. Where does this energy start from?
    11·2 answers
  • Get points!! type anything to answerr
    5·2 answers
  • Which of the following statements is true in humans?
    7·1 answer
  • What is the next step in the scientific method following forming a hypothesis?
    6·1 answer
  • 2-WHAT ARE SOME ALTERNATE USES<br> FOR BACTERIA?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!