I will give the brainliest answer to who ever answers this correctly!

1. The first stage of cellular respiration, glycolysis, results in two pyruvate molecules. Those pyruvate molecules are then used in what stage of cellular respiration?

a Active transport
b Phosphorylation
c The electron transport chain
d The Krebs cycle

2. A chloroplast has stopped producing ATP and NADPH. Which of the following is most likely causing this?

a The chloroplast has used up its supply of chlorophyll molecules.
b Electrons have stopped moving through the electron transport chain.
c The sun has risen and the chloroplast now can make more chlorophyll.
d Too much carbon dioxide (CO2) has started moving into the chloroplast.

3.What does the chloroplast produce during the light independent reactions of photosynthesis?

a NADPH molecules
b ATP molecules
c Carbohydrate molecules
d Chlorophyll molecules

-Krebs cycle is the second phase of cellular respiration, it occurs in the mitochondrial matrix and generates a pool of chemical energy (ATP, NADH, and FADH2) from the oxidation of pyruvate, the end product of glycolysis. Pyruvate is transported into the mitochondria and loses carbon dioxide to form acetyl-CoA, a 2-carbon molecule.

-Also during the Krebs cycle, the two carbon atoms of acetyl-CoA are released, and each forms a carbon dioxide molecule. Thus, for each acetyl-CoA entering the cycle, two carbon dioxide molecules are formed.

2. Answer;

b Electrons have stopped moving through the electron transport chain.

Explanation;

-Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis.

-Thus, the purpose of the chloroplasts are to manufacture sugars from CO2 and sunlight through the process of photosynthesis. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.

3. Answer;

-Carbohydrate molecules

Explanation;

-The light-independent reactions, or dark reactions, of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. These reactions occur in the stroma, the fluid-filled area of a chloroplast outside the thylakoid membranes.

-These reactions use the ATP and NADPH synthesized during the exergonic light-dependent reactions to provide the energy for the synthesis of glucose and other organic molecules from inorganic carbon dioxide and water.