Which molecules help control movement of substances through cell membranes? A. carbohydrates B. ATP C. DNA D. proteins

Biology

2 answers:

erik [133]3 years ago

5 0

Answer:

D. proteins

Explanation:

The plasma membrane is formed mainly by lipids and proteins. Lipids act by guaranteeing the membrane structure, while proteins are related to the main functions performed by this cell structure.

The proteins present in the plasma membrane are embedded in the bilayer. These proteins may be inserted totally or only partially into the membrane. It is worth mentioning that some act as true channels for the passage of substances. That is, we can say that membrane proteins are the molecules responsible for helping to control the movement of substances across cell membranes.

krek1111 [17]3 years ago

4 0

D. Proteins help control substances by making trans-membrane channels.

You might be interested in

What is an atom's atomic number?

vazorg [7]

Answer:

the number of protons in an atom

3 0

3 years ago

Cystathioninuria can be caused by two different mutations in the enzyme cystathionase. Cystathioninuria caused by mutation 1 can

polet [3.4K]

Answer:

C. The enzyme with mutation 1 has decreased affinity for pyridoxal phosphate, whereas the enzyme with mutation 2 has lost the ability to bind to the substrates.

Explanation:

A coenzyme is an organic cofactor that binds with an enzyme in order to initiate or aid the function of the enzyme. A coenzyme binds to the active site of the enzyme (where the reaction occurs), thereby triggering its activation by modifying protein structure during the reaction. Some examples of coenzymes include Coenzyme A and Adenosine triphosphate (ATP). Pyridoxal phosphate is a coenzyme (it is the active form of vitamin B6) that is required for the function of cystathionase. Moreover, cystathionase is an enzyme that enables cells the synthesis of cysteine from methionine (transsulfuration pathway). The binding of pyridoxal phosphate to the enzyme increases the binding affinity of the enzyme for the substrate, thereby influencing its activity. In this case, it is expected that mutation 1 reduces the binding affinity of the enzyme to the cofactor, and thereby the cofactor is required at a higher concentration to restore normal enzyme activity.

3 0

3 years ago

Within the light organ, bacteria are protected and nourished, and rapidly increase in number. At night, they provide the light n

enyata [817]

Answer:

At dawn the squid prepares to hide in the sand for the day and it ejects about 95% of the bacteria from the light organ in order to reduce or stop the growth of bacteria population in the squid. This will prevent the bacteria population from reaching a level too high for the squid to support.

7 0

3 years ago

Do you think acid rain has this effect on all living things?

Katyanochek1 [597]

Of course cuz it kills

8 0

3 years ago

Read 2 more answers

Suppose the human trait for hair type is controlled by a simple dominant and recessive relationship at one locus. Curly hair, C,

myrzilka [38]

Answer:

A) The frequency of the dominant allele, C $= 0.4376$