When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?
a. the ph of the matrix increases.
b. atp synthase pumps protons by active transport.
c. the electrons gain free energy.
d. nad+ is oxidized.

a. The pH of the matrix increases is the correct answer.

Explanation:

When electrons flow along the electron transport chains of mitochondria,The pH of the matrix increases because the electron transport chain is forming a gradient of hydrogen ions in respects to the matrix and the inner membrane surface of the mitochondria.

The concentration of hydrogen ion outside is higher as compared to the matrix. Thus due to higher concentration of hydrogen ions outside creates lower pH and the pH of the matrix increases.

hi!

it would be because of the artist sixnine.

hope this !

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.