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sveta [45]
3 years ago
15

A scenario where a cell may need to perform a form of endocytosis

Biology
1 answer:
navik [9.2K]3 years ago
5 0

Endocytosis is a term used to describe a process of active transport that facilitates the movement of particles such as molecules and parts of a cell or the whole cell into a cell.The best scenario for the process occurs when a cell needs to pass/transport molecules that are large and cannot move through the membrane passively.

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After eating a salty fish dinner you are very thirsty for plain water, a condition described as: A. intracellular thirst B. extr
Irina-Kira [14]

Answer:

A. Intracellular Thirst

Explanation:

There are two types of thirst and intracellular thirst and extracellular thirst. Extracellular thirst (dehydration) can be ruled out as it only requires water and salt to regenerate blood, at it's correct osmality. On the other hand, intracellular thirst (dehydration) can be corrected by drinking water alone. Therefore, the answer to this problem is intracellular thirst due to thirst for plain water.

8 0
3 years ago
in an experiment, you mutate the retinoblastoma gene such that its gene product behaves as if hyperphosphorylated. the result wo
lakkis [162]

Answer:

1. Weaker

2. Continuous

Explanation:

A tumor suppressor gene codes for retinoblastoma protein (pRb). The retinoblastoma protein binds to transcription factor E2F when DNA damage is detected. The E2F bound to pRb can not stimulate expression of genes that code for proteins required during the process of DNA synthesis. The cell can not enter the S phase.

On the other hand, when the retinoblastoma protein is phosphorylated by cyclin E-CDK2, E2F transcription factor is free to stimulate the expression of genes required for DNA synthesis and the cell proceeds from G1 to S phase.  

When the mutated retinoblastoma gene code for a protein that serves as phosphorylated protein, it will not be able to bind strongly with E2F and there would be continuous expression of genes required for S phase.  

3 0
3 years ago
Bladder contractions are controlled by the _____ nervous system.
igor_vitrenko [27]

Bladder is an internal organ, which is mainly made up of smooth muscles. The contractions of the smooth muscles are not under voluntary control. The contraction of these muscles are directed by brain, without any external control.

The autonomic nervous system is a part of nervous system, which is responsible for regulation of the all the conditions, which occur involuntarily. It directs the movements of all smooth muscles.

Hence, the movements of the bladder are controlled by the autonomic nervous system.

8 0
3 years ago
The first step to begin digestion of food starts with the _____
babunello [35]
The first step begins with: A. the mouth.
4 0
2 years ago
Read 2 more answers
LUIZ
oksano4ka [1.4K]

Answer:

anwser is C

Explanation:

they both have 6 carbon atoms so A is wrong

both are monosacchride so B is wrong

both have same molecular formula which is (C₆H₁₂O₆) so D is wrong

in glucose the anomeric carbon is the first carbon, whereas in fructose, the anomeric carbon is the second carbon. The anomeric carbon is the one containing the carbonyl group (carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom: C=O)

4 0
3 years ago
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