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
xxMikexx [17]
3 years ago
12

Discuss cell surface transport in the structure of constituents

Biology
1 answer:
nika2105 [10]3 years ago
3 0

Cell surface or membrane is made of phospholipid bilayer with embedded proteins and sugars. Cell membrane acts as a barrier between cell and its external environment but it is also responsible for the communication with other cells and transport of molecules inside and outside the cell. It is selectively permeable to ions and molecules (some of them pass through the membrane easily, while others require transport proteins or channels). There are 4 ways of molecule transport:

1. Diffusion – no energy required

2. Facilitated transport – transport proteins included

3. Active and co-transport – energy required

4. Vesicle transport (exocytosis and endocytosis)

Microvilli are extensions of cell membrane that increase its surface for diffusion.

Different types of cell junctions have a different influence on the membrane transport. For example, tight junctions are a barrier and the molecules are unable to pass through.


You might be interested in
Dr. Alexander Winemann is a ________ist who specializes in organic chemistry.
Lostsunrise [7]
Dr. Alexander Winemann is a Biologist who specializes in organic chemistry.
5 0
3 years ago
Which is true of genes? Question 4 options: They are proteins that produce sections of DNA which control the cell's activities.
OleMash [197]

The fundamental and functioning unit of genetics is called genes. They are units of DNA that produce proteins that control the characteristics of organisms.

<h3>What is the role of genes?</h3>

Genes are the basic and fundamental of inheritance and are made up of deoxyribonucleic acid. The variation of the gene of the same trait forms the alleles.

They code for the proteins that produce protein or RNA structures. Genes are located on the chromosome structure and code for proteins that play an important function and role in cell activity.

Therefore, option D. genes are a section of DNA that codes for proteins is correct.

Learn more about genes here:

brainly.com/question/787658

8 0
2 years ago
Glycine (C2H5NO2) is added to a growing peptide chain containing methionine (C5H11NO2S) and alanine (C3H7NO2). Which of the foll
Katena32 [7]

Answer:

First Image

Explanation:

Amino acid order is NCC (Nitrogen, alpha carbon with R group attached, and carboxy group).

If we start with methionine, then we write its nitrogen, then alpha carbon and then carboxy and then alanine's nitronge, alpha, carboxy, and end with glycine nitrogen, alpha and carboxy.

I have labelled the "R" groups to show amino acids. First is methionine, then alanine and then glycine.

6 0
2 years ago
Look at the pic pls help
77julia77 [94]

Answer:

Soo... Is that the answer you chose?

Explanation:

I think is correct.

5 0
2 years ago
Read 2 more answers
In rabbits, the gene for black fur is dominant over the gene for white fur. How can the appearance of white baby rabbits be expl
ozzi

Answer:

the baby would be black bc its the dominant gene

Explanation:

8 0
3 years ago
Other questions:
  • Which are not common resources derived from the ocean?
    6·2 answers
  • The complete set of genes that makes up a person's heredity is called
    15·1 answer
  • Some bacteria cause diseases in humans and other organisms, but
    11·2 answers
  • Do you think it's
    7·1 answer
  • What happens to grasslands and wetlands as forests are used up?
    8·2 answers
  • Three different dynamic carts of different masses are rolled down a ramp. The heaviest one rolls down the ramp the fastest. Befo
    14·1 answer
  • Why would an ecosystem With only a few different types of organizations to be more susceptible to disruption in an ecosystem wit
    13·1 answer
  • Which of the following stages of photosynthesis involves carbon fixation, reduction reactions, and the ribulose 1,5-bisphosphate
    10·2 answers
  • What is an allele and how does it relate<br> to a chromosome, a gene, and a trait?
    6·1 answer
  • which aspect of el nino can give scientists a preview of earth as temperatures rise with global warming?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!