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Murljashka [212]
2 years ago
9

Why some molecules can pass through a certain membrane,but other molecules can not?

Biology
1 answer:
fiasKO [112]2 years ago
4 0
It's depends on the size of molecule. big ones cannot pass the membrane while smaller molecules can.

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Need help with these questions answer what you can
OlgaM077 [116]

Answer 1:

The mutation shown is point mutation.

A point mutation can be described as a type of mutation in which only a single nucleotide of a sequence is either:

  • changed
  • added
  • deleted

The addition of the single nucleotide will cause the entire open reading frame to be changed. The amino acid sequence will change entirely from the position where the insertion mutation occurs. This is because the code for making amino acids works on a three base pattern. The reading of the three bases will be altered completely by the addition of just a single nucleotide.

Answer 2:

No, the resulting protein will not be altered.

The genetic code occurs in a linear sequence with triplet format. The change in a single base will cause the wrong amino acids to be formed. However, if the different code is common for the same amino acid then there will be no effect on the amino acid being formed.

<em>For example, the code GUA makes the amino acid Valine. If a mutation occurs and the code becomes GUU instead of GUA, then the resulting amino acid formed will also be Valine. Hence, there will be no alternation in the formation of the protein.</em>

Answer 3:

Melanoma cancer is the type of skin cancer which is associated with cancer from sun light. It is mainly caused due to the harmful ultraviolet rays which act as a mutagen.

<em>The mutations might keep coming back because although the growth have been removed, the other skin cells of the body might still have the mutation in them. As a result, growth will be seen again in the skin cells which might occur again and again. </em>

<em />

Explanation:

7 0
3 years ago
Self-heating cans use the concept of an interior heating vessel that is able to warm up food. The diagram below shows a model of
vovangra [49]

Answer:

C.

It is able to regulate the flow of the calcium oxide and water into the food to make it warm.

Explanation:

8 0
2 years ago
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What type of forest gets over 200 cm of rain a year ?
choli [55]
Temperate Rainforest and Tropical Rainforest
4 0
3 years ago
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in yeast cells , the process that occurs when there is not enough oxygen for aerobic respiration is called
zalisa [80]
I believe it is anaerobic respiration
4 0
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The major blood vessels that supply the skin lie between the dermis and the epidermis.
stiv31 [10]
The answer to this question would be: b. False
The area between dermis and epidermis is small and get oxygen from nearby capillary vessel bed, not a major blood vessel. You can find the major blood vessel in the dermis area. This vessel will supply enough blood to the skin, glands, and receptors inside the dermis.
5 0
3 years ago
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