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Leokris [45]
3 years ago
8

How does the structure of a cell membrane control the movement of molecules​

Biology
2 answers:
Andrews [41]3 years ago
4 0

Answer:

Explanation:

In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane.

olganol [36]3 years ago
4 0

Answer:

passing through it core

Explanation:

it inverts into points

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Explanation:

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4 years ago
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The DNA in linear eukaryotic chromosomes is wrapped around proteins called _____________, which keep the DNA from getting tangle
xenn [34]

Answer:

The given blank can be filled with histones.

Explanation:

The family of basic proteins, which associate with the DNA in the nucleus and assist in condensing it into chromatin are known as histones. The nuclear DNA does not come in the form of free linear strands, it is heavily condensed and enveloped around the histones so that to get fit within the nucleus and take part in the generation of chromosomes.  

These are the basic proteins, and because of their positive charge, they get associated with the DNA. Under the microscope, chromatin appears like beads on a string. The beads are known as nucleosomes. Each nucleosome comprises DNA wrapped around the 8 histone proteins, which works like a spool and is known as a histone octamer.  

5 0
3 years ago
Consider a gene with four alleles A1, A2, A3, and A4. How many distinct heterozygous genotypes are possible?
Troyanec [42]
This can be solved either by using a Punnet Square or you can use the formula (n(n+1))/2, where n is the number of alleles. However, using either method will give you the number of possible genotypes regardless if it's homozygous or heterozygous. If we use the second formula, that will give you 10 possible genotypes. Since you only want to know the number of heterozygous genotypes, you should subtract the number of possible homozygous genotypes. In this case, there are four. That is (A1,A1), (A2,A2), (A3,A3), and (A4,A4). Knowing this, you'd be able to figure out that there are six heterozygous genotypes.

(A1,A2), (A2,A3), (A3,A4), (A1,A4), (A1,A3), (A2,A4)
5 0
4 years ago
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svp [43]

Answer:

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I think the answer is the smooth muscle (GA tract)
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