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
alexira [117]
3 years ago
7

What is the difference between plasma membrane and cell membrane?

Biology
1 answer:
garri49 [273]3 years ago
3 0
The plasma membrane is the boundary between the cell and its environment. It regulates what enters and exits the cell. Cells must maintain an appropriate amount of molecules to function inside them. They must also have a way to keep things out or to allow things to enter. This is the job of the plasma membrane. The plasma membrane is like the guard at a gated community. The guard must inspect those who enter and those who leave to make sure that only the people and things needed in the community are there.

The cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out. It also serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others. Thus the cell membrane also serves to help support the cell and help maintain its shape.

You might be interested in
One of your lab partners has followed the recommended procedure of running Gram-positive and Gram-negative control organisms on
kow [346]

Answer:

The correct answer is "I would suggest her to change the Gram positive control from Bacillus subtilis to other bacteria".

Explanation:

Bacillus subtilis, and the species from the genre Bacillus, are known for losing the crystal violet coloration during Gram testing. It is likely that B. subtilis might look pink under the procedure for this reason. I would suggest to change her Gram positive control from B. subtilis to other bacteria. For instance, she could try with Staphylococcus aureus, a widely used bacteria as Gram positive control.

5 0
3 years ago
Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules
timurjin [86]

Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.

b. contain multiple variable domains ⇒ none

Both chains - light and heavy - contain <u>only one</u> variable domain (VL and VH).  

c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.  

d. are found in the FC fragment ⇒ heavy chains

The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.  

e. contain only one constant domain ⇒ light chains

Each light chain contains one variable domain (VL) and one constant domain (CL).  

f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.  

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

8 0
3 years ago
Describe the uses of model organisms
Arlecino [84]
A model organisms is a species that has been widely studied, usually because it is easy to maintain and breed in a laboratory setting and has particular experimental advantages. model organisms are non-human species that are used in the laboratory to help scientists understand biological processes.

(
First part is explaining second part is explaining the uses)
3 0
3 years ago
One of the most outstanding psychosocial accomplishments between ages 2 and 6 is:
Setler [38]
One of the exceptional psychosocial undertakings among ages 2 and 6 is emotional regulation. In addition, emotional regulation of emotion is the capability to react to the continuing loads of involvement with the variety of emotions in a way that is communally tolerable and adequately supple to permit impulsive responses as well as the capability to delay impulsive responses as needed.
4 0
3 years ago
6. Calculate the kinetic energy of a baseball thrown by Aroldis Chapman, who holds the world record for fastest pitch. The baseb
GrogVix [38]

Answer:

D

Explanation:

=122

5 0
2 years ago
Other questions:
  • How are gems different from regular minerals?
    14·2 answers
  • How photosynthesis can affect living organisms on earth and ocean
    14·1 answer
  • Heterotrophs convert solar energy into chemical energy. Please select the best answer from the choices provided T F
    9·2 answers
  • PLEASE HELP ME!!!!!!!
    11·1 answer
  • Which plant-cell organelle supports and maintains the cell's shape and protects the cell Consider this plant cell. The organelle
    15·1 answer
  • PLEASE ANSWER!!!!!!! What is true about the lagging strand during DNA replication?
    5·1 answer
  • A food web diagram is provided. Based on the diagram, which three consumers all get their energy directly from the same producer
    8·1 answer
  • What will happen if the niches of two organisms were moved to the others ecosystem/
    7·2 answers
  • Is the moon a star or a satellite
    15·1 answer
  • How many membrane layers cover the nucleus?<br> O A. 0<br> B. 3<br> C. 2<br> O D. 1
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!