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
S_A_V [24]
3 years ago
10

3 The plasma membrane is semipermeable because -

Biology
1 answer:
Irina-Kira [14]3 years ago
6 0

Answer: B) proteins in the membrane act like gates to control entrance and exit of molecules.

Explanation: Plasma membrane is composed of phospholipids bilayer in which the hydrophobic regions of the phospholipids face each other to form the core of the bilayer. Proteins are embedded in the bilayer through an interaction between the amino acid side chains and the nonpolar acyl chains of the phospholipids. The embedded membrane proteins form channels for passage of ions and other molecules. Each membrane protein is selected for one or more ions or molecules that passes through it. The membrane is said to be semipermeable because it allows the passage of some molecules and excludes the passage of others.

You might be interested in
In water snakes, body color is controlled by two alleles that display incomplete dominance. Snakes with the BB genotype are brow
Rainbow [258]

Answer:

Phenotypic ratio= 1 Brown : 1 Gray

Explanation:

Genotype of brown snake= BB

genotype of gray snake= Bb

A cross between brown (BB) and gray (Bb) snake obtains progeny in following phenotypic ratio= 1 Brown : 1 Gray

Here, the heterozygous parent, gray snake (Bb) forms two types of gametes in 1:1 ratio while the homozygous dominant parent, brown snake (BB) forms only one type of gamete.

4 0
3 years ago
Photo attached! Help please! 10 points.
kogti [31]

Hi the answer you are looking for is option A)

6 0
3 years ago
In which section of the text would you locate information about kings role in the early civil rights movement?
koban [17]

Answer: A. Peaceful protests

Explanation:

You included no text and neither did you reference one but this should be the correct answer.

Martin Luther King Jr. was known for his non-violent style of protests that would ensure that the government would not use any violence that ensues as pretext to shutdown the protest.

In organizing peaceful protests, King made civil rights marches and the movement in general more effective because they would stage longer protests that the government would have little justification for shutting down. It also drew more empathy from people for the movement who listened to the message and not the violence.

3 0
3 years ago
Why do cells divide instead of just grow larger
hjlf
There are two main reasons why cells divide rather than continuing to grow larger and larger. One of the main reason is that the larger cell become more demanding, therefore the large cell will increase load on the machinery of the cell such as DNA. The other reason is that if the cell grow too large it will be difficult for the cell to move for nutrients and discard the waste across the cell membrane. Also the surface area for each cell will also be reduced, which is required for active functionality of a cell.
5 0
3 years ago
Read 2 more answers
Which image in the onion root tip is an example of metaphase
Pachacha [2.7K]

Answer:

If any of the pictures represent the picture I attached or have any similar properties to it, that is most likely the answer.

Explanation:

Hope this helped :)

8 0
3 years ago
Other questions:
  • Isometric exercise strengthens muscles without __________. A. contracting muscle fibers B. changing muscle length C. burning cal
    10·1 answer
  • How are nondisjunction and polyploidy related?
    5·1 answer
  • What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting?
    13·2 answers
  • What are the two subdivisions of the Precambrian Era called?
    9·2 answers
  • One advantage of a monogastric digestive system is that __________.
    12·1 answer
  • Why is liquid water so important for life ? <br><br> I need multiple reasons and why plz
    5·1 answer
  • Food web stability is most dependent on _____.
    10·1 answer
  • Here is my hw and I need help, Please and Thank you!
    5·2 answers
  • Which statement is true about water molecules?
    7·1 answer
  • By putting them in a zoo, passing a law, or preserving their natural habitat, you can preserve a(n) ___________.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!