Question

From the following which is true about cellular respiration (select all that apply)

1. In prokaryotes, the electrons transport is in the plasma membrane  

2. Prokaryotic fermentation net yield is 4 ATP and oxidative respiration has 32 ATP

3. The major regulatory enzyme of glycolysis is Hexokinase

4. Substrate-level phosphorylation is catalyzed by kinase and transfers the phosphate group from an intermediate in a metabolic pathway directly to a molecule of ADP

B) Which statement is false about phosphate esters

1. can serve as intermediates in metabolic pathways that produce ATP

2. may be formed by the transfer of a phosphate group from ATP

3. can result from the reaction of a hydroxyl group with an acid

4. they're not found in molecules that have a sugar moiety

Answer 1

From the following which is true about cellular respiration (select all that apply).

The following two statements are true.

• In prokaryotes, the electrons transport is in the plasma membrane - eukaryotes don't have special organelles like mitochondria for electron transport chain so ETC occurs in the plasma membrane.
• Substrate-level phosphorylation is catalyzed by kinase and transfers the phosphate group from an intermediate in a metabolic pathway directly to a molecule of ADP - yes substrate-level phosphorylation is the production of ATP from ADP by direct transfer of high energy phosphate group from the phosphorylated intermediate.

The followings statements are false.

• Prokaryotic fermentation net yield is 4 ATP and oxidative respiration has 32 ATP - prokaryotic fermentation net Yield is 2 ATP and 32 ATP.
• The major regulatory enzyme of glycolysis is Hexokinase - it's not only one regulatory enzyme. with his phosphofructokinase and pyruvate kinase also regulatory enzymes. but phosphofructokinase is a prominent enzyme.

B) Which statement is false about phosphate esters is 4. they're not found in molecules that have a sugar moiety

The followings are true statements.

1. can serve as intermediates in metabolic pathways that produce ATP
2. may be formed by the transfer of a phosphate group from ATP - they formed in physiological condition using ATP as phosphate donor and enzyme.
3. can result from the reaction of a hydroxyl group with an acid - it's true.

The false statement is 4. they're not found in molecules that have a sugar moiety because they found in sugar moiesty where they bond between sugar base of one nucleotide and phosphate group of other nucleotides.