Which of the following statements must be true in order for ATP synthase present in chloroplasts to function properly?

Biology

1 answer:

Agata [3.3K]3 years ago

7 0

<h3><u>Answer;</u></h3>

b. the pH of the stroma must be higher than the pH of the thylakoid lumen

<h3><u>Explanation</u>;</h3>

<em><u>Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma.</u></em>
Higher [H+] means lower pH, while Lower [H+] means higher pH. During the process of photosynthesis, the lumen becomes acidic, as low as pH 4, compared to pH 8 in the stroma.

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Tall plants are dominant over short plants. One parent is homozygous dominant and the other is heterozygous for plant height.

Greeley [361]

Answer:

a. all tall

Explanation:

If genotypically one of the parents is homozygous dominant and another one is heterozygous for plant height then phenotypically all their progeny will be tall.

Let us suppose, 'T' represents dominant allele and 't' represents recessive allele. Then the genotype of one parent who is homozygous dominant will be TT and genotype of another parent who is heterozygous will be Tt.

The cross is depicted in the attachment.

Here it may also be noted that genotypically two of the progeny will be homozygous dominant while two of the progeny will be heterozygous but phenotypically all the progeny will be 'tall'.