exam 1 clicker questions Flashcards
1
Q
rank the molecular interactions form strongest to weakest. A. Van der Waal’s attraction B. Hydrogen Bonding C. Ionic Bonds D. Ion-Dipole
A
C>D>B>A
2
Q
is H2 an Ionic or Covalent Bond?
A
covalent
3
Q
is LiF an Ionic or Covalent Bond?
A
Ionic
4
Q
Which element would you expect radium (Ra) to imitate in our bodies upon exposure? A. Potassium (K) B. Calcium (Ca) C. Zinc (Zn D. Iron (Fe)
A
B
5
Q
4. How many amino acids is all of life built upon? A. 30 B. 24 C. 20 D. 16
A
C
6
Q
You sequence a strand of DNA and find that 30% of the nucleotides are Thymine. What percentage will be Adenine? A. 30% B. 60% C. 40% D. 20%
A
A
7
Q
You sequence a strand of DNA and find that 30% of the nucleotides are Thymine. What percentage will be Guanine? A. 30% B. 60% C. 40% D. 20%
A
D
8
Q
what is more readily digested, something with or without Beta-glucose
A
without
9
Q
4. Which type of fatty acid will likely have the higher melting point? A. Shorter and unsaturated B. Shorter and saturated C. Longer and saturated D. Longer and unsaturated
A
C
10
Q
- Which kind of problem led to the tragic injury
to infants whose mothers took Thalidomide during
their pregnancies?
A. Thalidomide is an indigestible polysaccharide.
B. Thalidomide contains harmful chemical elements (including
Arsenic)
C. Thalidomide occurs in two stereoisomer forms, one of which causes birth defects among other toxic effects.
D. Thalidomide is an example of a teratogen – causing cancer.
A
C
11
Q
2. Which type of fatty acid will likely have the lowest melting point? A. Shorter and unsaturated B. Shorter and saturated C. Longer and saturated D. Longer and unsaturated
A
A
12
Q
- This molecule is an important catabolic
intermediate for the production of ATP whether
you are starting with fats, carbs, or proteins.
A. Adenosine Triphosphate
B. Glucose
C. FADH2
D. Acetyl CoA
A
D
13
Q
2. At the end of glycolysis, how many net ATP’s are produced? A. ~1 B. ~2 C. ~14 D. ~38
A
B
14
Q
3. If oxygen is not present, the next stage after glycolysis will be: A. The Citric Acid Cycle B. Fermentation C. The electron transport chain D. Pyruvate oxidation
A
B
15
Q
- The purpose of the electron transport chain in cellular respiration is to:
A. Create a proton (H+) gradient in the mitochondria
B. Convert pyruvate to acetyl coA
C. Release carbon dioxide gas from the cell
D. Break down glyceraldehyde
A
A
16
Q
- Glycolysis is:
A. aerobic
B. anaerobic
C. aerobic in some organisms but anaerobic in others
D. aerobic in some tissues but not anaerobic in others
A
B
17
Q
2. Which of the following is NOT one of the net final products of glycolysis? A. Two molecules of pyruvate B. Two molecules of ATP C. Two molecules of NADH D. Two molecules of acetyl-CoA
A
D
18
Q
- Cellular respiration releases energy. In cellular respiration:
A. Organic molecules such as carbohydrates are converted to chemical energy that can be used to do the work of the cell.
B. The chemical potential energy stored in organic molecules is converted to chemical energy that can be used to do the work of the cell.
C. Chemical potential energy in the bonds of ADP is transferred to the chemical potential energy in the bonds of ATP.
A
ALL CORRECT
19
Q
4. A molecule that is \_\_\_\_\_ loses electrons, and a molecule that is \_\_\_\_\_\_\_ gains electrons. A. Reduced; oxidized B. Negative; positive C. Oxidized; Reduced D. Weak; Polar
A
C
20
Q
5. At the end of the electron transport chain, how many net ATP’s are produced? A. ~1 B. ~2 C. ~14 D. ~32
A
D
21
Q
- The purpose of the electron transport chain in cellular respiration is to:
A. Create a proton (H+) gradient in the mitochondria • B. Convert pyruvate to acetyl coA
C. Release carbon dioxide gas from the cell
D. Break down glyceraldehyde
A
A
22
Q
- Even though the full oxidation of glucose is
exergonic, some of the reactions in cellular
respiration are endergonic.
A. True
B. False
A
A
23
Q
- The pH in the inter-membrane space of the mitochondria should be____ compared with the matrix due to the higher concentration of protons in the inter-membrane space.
A. Lower
B. Higher
A
A
24
Q
1. What substance is converted into lactic acid during fermentation? A. Pyruvate B. NADH C. Glucose D. ATP
A
A
25
Q
2. Which of the following foods result from fermentation? A. Yogurt B. Some cheeses C. Both A and B D. Neither A or B
A
C
26
Q
3. During fermentation, \_\_\_ is oxidized back to \_\_\_ to be reused in breaking down glucose A. ATP; ADP B. NADH; NAD+ C. Pyruvate; Glucose D. Lactic acid; pyruvate
A
B
27
Q
4. The bacteria responsible for lactic acid fermentation in yogurt is: A. E. coli B. H. pylori C. Lactobacillus D. Spirochaetes
A
C
28
Q
How does the presence of high ATP affect the activity of the enzyme phosphofructokinase? A. The activity is lowered B. The activity is unchanged C. The activity is raised D. All of the above could be correct
A
A
29
Q
Methotrexate is a chemotherapy drug. It is structurally similar to the coenzyme folate which binds to the enzyme dihydrofolate reducatase. This enzyme is part of the synthesis of DNA and RNA, and when methotrexate binds the enzyme, it renders it inactive by blocking folate, so it cannot synthesize DNA and RNA. Thus, the cancer cells are unable to grow and divide. What kind of regulation is it?
A. Allosteric activation
B. Allosteric inhibition
C. Competitive inhibition
D. Non-competitive allosteric inhibition
A
C
