Question

26.) What is the purpose of ATP produced in in the light reactions of photosynthesis?

a. to provide energy for fixing carbon in the calvin cycle

b. to provide energy for general plant function

c. to provide energy to produce sugar and cell wall material

d. A and C

e. A and B

f. A,B, and C

27.) What role does the ribosome play in translation?

a. Binds the mRNA

b. Binds tRNA

c. makes peptide bonds

d. A and B

e. A, B, and C

28.) Which of the following statements best describes the relationship between photosynthesis and respiration?

a. Respiration runs the biochemical pathways of photosynthesis in reverse.

b. Photosynthesis stores energy in organic molecules; respiration releases energy from organic molecules

c. Photosynthesis occurs only in plants; respiration occurs only in animals.

d. ATP molecules are produced in photosynthesis but not in aerobic respiration.

e. Photosynthesis is catabolic; respiration is anabolic.

29.) Which of the following statements is true about enzyme-catalyzed reactions?

a. The reaction is faster than the same reaction in the absence of the enzyme.

b. The free energy change of the reaction is opposite from the reaction that occurs in the absence of the enzyme.

c. An enzyme catalyzes a reaction by raising the activation energy.

d. Enzyme-catalyzed reactions require energy to activate the enzyme.

e. Enzyme-catalyzed reactions release more free energy than noncatalyzed reactions.

30.) Which portion of an amino acid is unique among the different amino acids?

a.  the carboxyl group

b.  the amino group

c.  the hydrocarbon chain

d.  the N-terminus

e.  the R-group

Answer 1

26.

a. to provide energy for fixing carbon in the calvin cycle

Explanation :

In light reaction of photosynthesis , photystems absorb light energy using its pigments ( chlorophylls and other accessory pigments) and convert it into ATP . Using light electron is separated from water and they are moved across electron transport chain in which ATP synthase helps them to generate ATP using electrochemical gradient.

The ATP wi be used in dark reactions of photosynthesis to fix carbon

27 ) c) A and B

Ribosome is site of translation in which mRNA, tRNA holding the aminoacids can bind and synthesize proteins based on the genetic code

28.b. Photosynthesis stores energy in organic molecules; respiration releases energy from organic molecules

Photosynthesis produce organic molecules by fixing carbon using water and light whereas respiration degrades irganic molecules to produce energy that is required for function of the plants

29.a. The reaction is faster than the same reaction in the absence of the enzyme

Enzymes speed up the conversion process by decreasing the activation energy

30) R group

Based on the R group an amino acid can be differentiated and all amino acids have different R groups but same n group and carboxyl groups