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wlad13 [49]
3 years ago
15

Give two reasons that a particular molecule may be unable to cross the plasma membrane ​

Biology
1 answer:
Harlamova29_29 [7]3 years ago
5 0

Answer:

The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.

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Alexeev081 [22]

Answer:

All of those answer are correct.

5 0
2 years ago
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There are twenty different types of _____________ which join together in differing sequences and numbers to form different prote
Alexxandr [17]
There are .................... of AMINO ACIDS which join together ........................
Amino acids are the building units of protein. There are basically twenty different types of amino acids which are divided into two classes of essential and non essential amino acids based on their requirements in human nutrition. These amino acids joined together in different manner to form different types of proteins.
7 0
3 years ago
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1. Cytokinesis in plant cells result in the formation of a cell plate between the new cells , while cytokinesis in animal cells
Stella [2.4K]

Answer:

Yes it is right

Explanation:

8 0
2 years ago
In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-posi
asambeis [7]

Cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-positive bacteria because the outer membrane of the gram-negative bacteria inhibits penetration of the drug and the peptidoglycan found in gram-positive bacteria is structurally different from that in gram-negative bacteria.  

Answer: Option B & C

<u>Explanation:</u>

Antimicrobial drugs are induced into a body to act on that particular selective bacterium which causes disease. When antimicrobial drugs are injected they act efficiently on the gram positive bacteria inhibiting the proliferation of the cells by acting on the cell wall so that cell multiplication doesn’t happen.

On the other hand it is hard to act on the gram-negative bacteria as it has a cell membrane that inhibits drug penetration into it. Both cell walls contain peptidoglycan but in the gram-positive is more assembled and layered while in the gram-negative it is just a thin layer. As gram-positive is thick layered it provides place for another molecule to attach to it but the thin layer in gram-negative inhibits it.

4 0
3 years ago
Which statement best explains why tropical climates are so hot?
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<span>They receive more direct sunlight than other regions.</span>
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