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
Daniel [21]
4 years ago
14

What is cell membrane

Biology
2 answers:
sdas [7]4 years ago
8 0

Answer: Cell membrane is layer which is present in all living cells. It is present under the cell wall but in some cases such as plant cells.

Explanation: It is composed of lipid bilayer and proteins embedded in it. Phospholipids, glycolipids and sterols is the composition. Its function is to protect the cell from extracellular environment. It is semipermeable membrane that js allow only selected molecules to pass.

liubo4ka [24]4 years ago
4 0

Answer: A cell membrane is a phospholipid bilayer that defines the external boundaries of cells and regulate the molecular traffic across the boundary.

Explanation: Cell membranes are flexible, self-sealing and selectively permeable bilayer of phospholipids with proteins embedded in the bilayer through hydrophobic interactions. Cell membranes are formed by the interactions of the hydrophobic tails of the phospholipids, the hydrophobic tails of the phospholipids face each other while their polar head groups face outward, thus forming a bilayer with a fluid hydrophobic core. The selective permeability of membranes makes them to retain certain compounds and ions within cells while excluding others. Cell membranes include an array of proteins specialized for promoting or catalyzing various cellular processes such as synthesis of lipids and certain proteins and the energy transductions in mitochondria and chloroplasts.

You might be interested in
Which statement BEST describes the difference between chemotherapy and biological therapy?
const2013 [10]

Answer:

Chemotherapy targets the cell directly; biological therapy tries to help the immune system so it will attack the cancer cells.

Explanation:

Both chemotherapy and biological therapy are approaches used in cancer treatment.

Chemotherapy involves the use of aggressive anti-cancer drugs. It targets cancer cells directly with the goal to destroy them.

Biological therapy, also called immunotherapy, is a type of treatment used in battling diseases by activating or suppressing the immune system. It is also used in cancer treatment. Its goal is to boost the immune system and help it fight against cancer.

6 0
3 years ago
Read 2 more answers
A cells relatively constant internal physical and chemical conditions are called?
Kay [80]
A cells relatively constant internal physical and chemical conditions are called Homeostasis.
4 0
3 years ago
Use the drop-down menus to answer some questions about ground tissue.
svetoff [14.1K]

Answer:

Ground tissue is the "fleshy areas"of the plant.

Ground tissue has "many" functions.

5 0
3 years ago
Read 2 more answers
The pulmonary semilunar valve guards the entrance to the
cestrela7 [59]

Answer:

<h2>pulmonary trunk</h2>

Explanation:

The pulmonary valve is an important semilunar valve and found in the heart between the pulmonary artery and the right ventricle. This valve contains three cups that are responsible for the guarding of the pulmonary trunk. The pulmonary trunk is an important vessel of the heart that arises from the right ventricle and plays an important role in the circulation of the deoxygenated blood. The pulmonary trunk is called the main pulmonary artery.

7 0
3 years ago
Amino acid, globular structure C, H, O, N, amino acid sequence smallest to largest
nlexa [21]

 

<span>Given:

</span>

<span>H
C
N
O
amino acid</span>

Amino Acid sequence

Global Structure

 

<span>Find:

Order from smallest to largest = ?</span>

 

H, C, N, O, amino acid, amino acid sequence, globular structure.

<span>
These contains</span> amine and carboxyl functional groups, along with a side chain specific to each amino acid.

5 0
3 years ago
Other questions:
  • Human pedigrees do not show the clear patterns that mendel found in his peas because
    10·1 answer
  • Which chamber of the heart pumps oxygen-poor blood to the lungs?
    7·1 answer
  • Ocular albinism is an X-linked recessive trait that causes a lack of pigmentation in the eyes.
    9·1 answer
  • Why are bacteria needed in the nitrogen cycle?
    10·1 answer
  • Which question can be answered using the
    5·1 answer
  • Who is responsible for conducting the initial written risk assessment for experiments involving biohazards?
    10·1 answer
  • Why are green plants or algae good indicators of the distribution of living organisms in an area?
    12·2 answers
  • How do trees prevent flooding​
    11·2 answers
  • How a person fits into a food web?
    11·2 answers
  • I will give brainliest
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!