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professor190 [17]
3 years ago
7

cell membranes are made of phospholipids which form a hydrophobic barrier. How does water pass through the cell membrane?​

Biology
1 answer:
Alla [95]3 years ago
8 0
Water is a small molecule that easily diffuses through a cell membrane despite the lipid tails. The diffusion of water is what we call “osmosis”. Oxygen is a small molecule and it is also nonpolar, so it easily passes through a cell membrane.

It is able to pass through because of the high osmotic pressure difference between the inside and outside of the cell.

Most of the water passes through channels called “aquaporins”.
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Phantasy [73]

Answer:

type 1 diabetes and cancer

Explanation:

All the others are contagious diseases that you can contract, but type 1 diabetes and cancer can be caused by genetics. The others are all things that you can usually recover from while cancer and diabetes are usually conditions that cannot be escaped sadly.

3 0
3 years ago
Which of the following best relates behavior and evolution?
jok3333 [9.3K]
<span>B. Inherited behaviors that allow animals to survive and reproduce will be spread throughout the population and can evolve by natural selection.</span>
3 0
4 years ago
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If a dna analysis reveals that a cell has 60 ng of adenine and 20 ng of cytosine, how much thymine and guanine are in the cell?
Serggg [28]

Answer:

Thymine= 60 ng

Guanine= 20 ng

The complementary base pairing occurs between adenine and thymine and guanine and cytosine bases.

Explanation:

According to the Chargaff rule, a double-helical DNA molecule has an equal number or equal amount of adenine and thymine bases since adenine always pairs with thymine. Similarly, the amount of guanine base is equal to that of the cytosine base.

Chargaff rule is based on the complementary base pairing between purine and pyrimidine bases. According to the given information, the amount of adenine is 60 ng. Therefore, the cell would have 60 ng thymine. Similarly, the amount of the cytosine base in the cell is 20 ng which means that the cell would have 20 ng of guanine base.

5 0
3 years ago
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I hope this helps
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