BABAWI TAYO @ENGLISH PEEPS
BIOTECH
1._____ are the nitrogen-containing bases which consist of a double heterocyclic nitrogen
ring.
a) cytosine b) purines
c) uracil
d) pyrimidines
2. The complete beta oxidation of a 16-carbon fatty acid would yield ____ATP
molecules.
a) 36
b) 72
c) 114
d) 130
3. A cell that is missing lysosomes would have difficulty doing what?
a. digesting food
c. packaging proteins
b. storing energy
d. moving cytoplasm
4. Which of the following protein structures does denaturation destroy?
A) primary and secondary structures
B) secondary and tertiary structures
C) tertiary and quaternary structures
D) secondary, tertiary, and quaternary structures
5. Which of the following is a definition of messenger RNA (mRNA)?
a. RNA found in the ribosome, the site in cells where synthesis of proteins takes place
b. RNA which carries a specific amino acid to the site of protein synthesis
c. RNA which has coded genetic information
d. RNA which signals cell death
7. How many hydrogen bonds are present in a G—C base pair and an A—T base pair,
repsectively?
a. 1, 2
b. 2, 2
c. 2, 3
d. 3, 2
8. A double-stranded DNA molecule that contains 22%C, on a mole basis, T must also
contain
a. 22% G
b. 22% A
c. 78% A
d. 78% G
9. If a cell did not have ribosomes, it would be unable to
a. extract energy from
glucose
b. form proteins c. store food in the form d. synthesize glucose
10. Part of a certain DNA sequence is GGTCTATAC. What is the complementary
sequence?
a. CCAGATATG b. TTGAGCGCA c. AAGTGTTAC d. CCGTGTCAG
11. A lab technician may prevent a blood sample from clotting by adding a compound
that prevents from
entering the clotting process.
a. potassium citrate b. Vitamin K c. sodium ion d. calcium ion
12. Which organ is especially sensitive to a vitamin deficiency?
a. skin b. liver c. heart d. lungs
13. Part of a certain DNA sequence is GGTCTATAC. What is the complementary
sequence?
a. CCAGATATG b. TTGAGCGCA c. AAGTGTTAC d. CCGTGTCAG
14. Which of the following metabolic pathways results in a net gain of two ATP and zero
NADH molecules per glucose molecule?
a. glycolysis b. fermentation c. krebs cycle d. ETC
15. Which sequence shows the “central dogma” of molecular biology?
a. DNA®protein®amino
acids
b. RNA®protein®DNA c. RNA®DNA®protein d. DNA®RNA®protein
16. An enzyme classified as a ligase would be associated with a reaction than involves
the: loss of water
17. Proteins that act as catalyst in biochemical reactions involving living organisms are:
Enzymes
18. The formation of amino acids from proteins: Occurs during digestion
19. Which of the following represents the general sequence of events in the catabolism
of nucleic acids? Hydrolysis, dephosphorylation, cleavage of the sugar
20. It is the most abundant naturally occurring polysaccharide in nature. Cellulose
21. By a simple transamination reaction, intermediates in the Citric Acid Cycle can be
converted in one step to all of these amino acids, except, Cysteine
22. The Phosphodiester linkages in DNA and in RNA are, 3’ to 5’, 3’ to 5’
23. Which of the following processes is used to harden an oil to give a fat?
Hydrogenation
24. Cell membranes, which form an effective barrier to the passage of ions and other
components into and out of the cell, are: Lipid bilayers
25. Chemically, these are triaclyglycerols, triesters of glycerol with three long chain
carboxylic acids. Fats and oils
26. The carbon chains of amino acids enter the major metabolic pathways through all of
these compounds, except: Glyceraldehyde
27. This many ATP equivalents are required to produce one molecule of urea from
ammonia: Three ATP equivalents
28. The Citric Acid cycle is considered to be the central metabolic pathway for all the
following reasons, except:
a. It is involved in the metabolism of sugars and amino acids
b. It is involved in the metabolism of amino acids and lipids.
c. It links anaerobic metabolism to aerobic metabolism
d. Many of its intermediates why the citric acid cycle is considered to be the central
pathway
e. All of these reasons why the citric acid cycle is considered to be the central pathway
29. During the complete catabolism of a molecule of glucose, the ultimate fate of the
carbon atoms are: Carbon Dioxide
30. What is the final product of complete hydrolysis of amylpectin? Glucose
31. Fatty Acids are long chained: Carboxylic Acids
32. Common table sugar, sucrose, is a disaccharide made up of one molecule of
glucose and one molecule of: Fructose
32. A deficiency of this vitamin can result in defective collagen. Vitamin C
33. When determining the iodine number for an unsaturated fatty acid, it is the alkene
bonds of the molecule that reacts with the iodine.
34. The fatty acid cycle removes two carbon units per cycle, until the fatty acid has been
completely oxidized.
35. Rancidity of the fatty oil can be reduced by: Hydrogenation
36. The primary structure of protein refers to the sequence of amino acids.
37. Prokaryotic Cells lack
a. Nucleolus
these
b. Nuclear membrane c. Membrane bound by organelles d. All of
38. It is the aerobic metabolism of carbohydrates: Kreb’s cycle
39. Vitamins C considered as a Water Soluble
40. Which of the following choices are considered to be polymers of amino acids? Are
they:
a. nucleotides b. carbohydrates c. lipids d. proteins
41. One of the following is not lipid:
a. fats and oils b. starches c. steroids d. waxes