1. The main function of cellular respiration is _____.

a) breaking down toxic molecules;

b) making ATP to power cell activities;

c) making food;

d) producing cell structures from chemical building blocks;

e) breaking down ATP, so that SDP and P can be reused.

2. In cellular respiration, _____ is oxidized and _____ is reduced.

a) oxygen…ATP; b) ATP … oxygen; c) glucose … oxygen; d) CO2 …water; e) glucose…ATP.

3. A glucose molecule is completely broken down in glycolysis and the Krebs cycle, but these two processes

yield only a few ATPs. Where is the rest of the energy that the cell obtains from the glucose molecule?

a) in FAD and NAD;   b) in the O2 used in the ETC;   c) lost as heat;   d) in NADH & FADH2

4. In eukaryotes, the electron transport chain is a series of electron carrier molecules embedded in which

organelle?

a) the smooth ER;   b) the rough ER;   c) plasma membrane;   d) mitochondria

5. The net gain of ATP for each glucose molecule that enters glycolysis is, in the absence of oxygen,

approximately?

a) 38 ATP;   b) 4 ATP;   c) 2 ATP;   d) 0 ATP;   e) hum…

6. What is the name of the process in which pyruvate is converted to lactate?

a) chemiostic theory;   b) fermentation;   c) glycolysis;   d) Krebs cycle

7. The ultimate source of energy to support most life on Earth is _____.

a) photosynthetic plants; b) chemosythetic microbes; c) sunlight; d) the carbon cycle

8. The photosynthetic membranes are found in the __________ in plant cells.

a) golgi complex;   b) endoplasmic reticulum;   c) mitochondria;   d) chloroplasts;   e) nucleus

9. When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____.

a) splitting of water; b) breaking down ATP; c) removing them from NADPH; d) fixing carbon;

10. Photosynthesis is an __________ process of carbon __________, while respiration is an __________

process of carbon __________.

a) endergonic ... reduction ... exergonic ... oxidation;

b) endergonic ... oxidation ... endergonic ... reduction

c) exergonic ... reduction ... endergonic ... oxidation;

d) endergonic ... oxidation ... exergonic ... reduction

11. The overall function of the Calvin cycle is _____.

a) capturing sunlight;   b) making sugar;   c) producing CO2;   d) splitting of water;

e) oxidizing glucose.