These questions will be similar to the ones on lecture test 3 (Chapters 5 Membranes, 7 Metabolism & 8 Respiration).
1). How thick is the plasma membrane? ___________________
2). An animal or plant can make the cell membrane more viscous by
using : _____________________ fatty acids.
3). What happens to an animal cell in a hypertonic solution ?
a) it shrinks b) it stays the same size
c) it bursts d) it swells slightly
4). In which direction do the sodium ( Na+ ) and potassium ( K+ ) ions
move in the sodium/potassium pump ?
a) Na+ into the cell, K+ out b) K+ into the cell, Na+ out
c) Na+ into the cell, K+ in d) K+ out of the cell, Na+ out
5). Respiration is a __1__ reaction that __2__ energy.
a) catabolic ; requires b) catabolic ; releases
c) anabolic ; requires d) anabolic ; releases
6). In anaerobic respiration, pyruvate is converted into ___________ in
animals and ________________ in plants.
7). Krebs cycle turns __1__ into CO2, and produces __2__ NADH molecules
a) pyruvate ; 6 b) glucose ; 2
c) pyruvate ; 2 d) glucose ; 6
8). In aerobic respiration, how many carbon dioxide molecules are
produced from the breakdown of one glucose molecule ?
a) 1 b) 2 c) 4 d) 5 e) 6
9). Apart from ATP and NADH, Krebs cycle also stores chemical energy as
the molecule : __________
10). Give an example of exocytosis : _________________________________
11). State the second law of thermodynamics : __________________________
___________________________________________________________________
12). Energy of movement is called ______________ energy.
13). In the catabolism of food, apart from the electron transport chain (ETC)
amino acids are broken down by:
a) glycolysis and Krebs cycle b) Krebs cycle only
c) glycolysis only d) none of these
14). An inhibitor which attaches to the active site of an enzyme is
called a : ______________________ inhibitor.
15). Why does the rate of an enzyme controlled reaction typically
decrease if the temperature rises above 40oC ?
___________________________________________________________________
16). What is phagocytosis? ______________________________________
17). How many carbon atoms are there in a molecule of pyruvate?
a) 2 b) 3 c) 4 d) 5 e) 6
18). The electron transport chain of respiration produces __ ATP molecules.
a) 2 b) 32 c) 16 d) 34 e) 36
19). Give an example of a coenzyme: __________________________________
20). How many oxygen molecules react with one glucose molecule in
aerobic respiration?
a) 1 b) 2 c) 4 d) 5 e) 6
21). What is the function of the oligosaccharides that stick up from the
surface of the cell membrane?
___________________________________
22). Enzymes are:
a) lipids b) carbohydrates c) proteins d) steroids
23). ATP stands for:
a) Adenosine Tri Phosphate b) Adenine Tri Phosphate
c) Adenosine Tri Potassium d) Adeine Tri Potassium
24). The area in an enzyme that fits around the substrate is called the:
____________________________________
25). Which stage in aerobic respiration produces carbon dioxide?
a) Krebs cycle b) glycolysis
c) Calvin cycle d) electron transport chain