Lecture 28: Plant Respiration

Question 1

role of photosynthesis

Answer 1

pathway of carbon fixation

Question 2

role of respiration

Answer 2

oxidation of photoassimilates

Question 3

steps of respiration in plants

Answer 3

1. Glycolysis
2. Oxidative Pentose Phosphate Pathway
3. Citric acid cycle
4. Oxidative phosphorylation

Question 4

what does glycolysis mean

Answer 4

breakdown of glucose

Question 5

what does glycolysis produce

Answer 5

1 glucose ——-> 2 pyruvate + 2 ATP +2 NADH + 2H+

Question 6

major products of oxidative pentose phosphate pathway

Answer 6

NADPH and ribulose-5-phosphate

Question 7

Citric acid cycle

Answer 7

pyruvate enters the mitochondrion
oxidization of pyruvate in the mitochondrion matrix
stage 1 - carbon condensation
stage 2 - OAA regeneration from Succinyl CoA

Question 8

total yields of the citric acid cycle

Answer 8

6 CO2
2 ATP
8 NADH
2 FADH2

Question 9

oxidative phosphorylation

Answer 9

the final step in energy producing metabolism where electron energy from NADH and FADH2 is used to produce ATP

Question 10

what are the electron donors in the citric acid cycle

Answer 10

NADH and FADH2w

Question 11

what does complex 2 do in the citric acid cycle

Answer 11

oxidize succinate

Question 12

what process does iron (Fe) play a central role in

Answer 12

electron transport (oxidation/reduction)

Question 13

comparison of chemiosmosis between mitochondrion and chloroplast

Answer 13

Mitochondrion - NADH and FADH2 are e- donors. O2 is an e- acceptor
Chloroplast - light converts H2O to be e- donor. NADP+ is an e- acceptor