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BIO 150 Final Exam Questions and Answers
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BIO 150 Final Exam Questions and Answers
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BIO 150 Final Exam Questions andAnswers 2024-2025
_________ produce the extracellular matrix.
a. Keratinocytes
b. Fibroblasts
c. Melanocytes
d. Lymphocytes
e. All of the above - ANSWER-
__________ activate adenylate cyclase to produce the secondary messenger cAMP
(cyclic AMP) in order to magnify the signal.
a. Steroid hormone receptors
b. Receptor kinases
c. Ligand-gated ion channels
d. G protein-coupled receptors
e. All of the above - ANSWER-
___________ are composed of proteins that form pore-like tunnels between cells for
passage of small molecules.
a. Tight junctions
b. Adherence junctions
c. Desmosomes
d. Gap junctions
e. All of the above - ANSWER-
____________ form a watertight seal between neighboring cells.
a. Tight junctions
b. Adherence junctions
c. Desmosomes
d. Gap junctions
e. All of the above - ANSWER-
____________ is the major enzyme responsible for fixing carbon during the Calvin
Cycle.
a. Dehydrogenase
b. Isomerase
c. 1, 5 bisphosphate
d. Rubisco
e. Hexokinase - ANSWER-D
_______________ are enzymes responsible for "charging" a tRNA with the proper
amino acid (in other words, adding the amino acid to the corresponding tRNA).
a. Initiation factors
,b. Amino-acyl tRNA synthetases
c. Release factors
d. Elongation factors
e. Ribosomes - ANSWER-
_______________ is a term that describes both the polar and nonpolar nature of
phospholipids.
a. amphitheaters
b. ambidextrous
c. amphibolic
d. amphipathic
e. amphibious - ANSWER-D
_________________ are organic molecules composed of monosaccharides joined
together by a glycosidic bond. They can be used as a source of energy for metabolism.
- ANSWER-carbohydrates
_________________ is the enzyme responsible for RNA synthesis. - ANSWER-RNA
polymerase
____________'s x-ray crystallography data was used to discover the DNA double helix
without their permission.
a. James Watson
b. Francis Crick
c. Maurice Wilkins
d. Rosalind Franklin
e. Eileen Hotze - ANSWER-
A ___________ is a statement that makes testable predictions about observations
made. - ANSWER-hypothesis
A general explanation of an aspect of the world, which is supported by large amounts of
experiments and observations is called a(n) ______________.
a. Experiment
b. Observation
c. Hypothesis
d. Theory
e. Null hypothesis - ANSWER-D
A human cell arrested at G2 phase will have ________ chromosomes.
a. 23
b. 46
c. 92
d. 12
e. 235 - ANSWER-
, A lack of telomerase activity limits _______________.
a. The rate of meiosis
b. The number of replication bubbles that form
c. The number of Okazaki fragments synthesized
d. The rate of DNA synthesis
e. The number of times a cell can divide - ANSWER-
A red blood cell (RBC) was placed in three beakers labeled A (0.9% saline), B (1.9%
saline), and C (0.4% saline). If the internal salinity of the RBC is 0.9%, in which beaker
will the RBC burst?
a. Beaker A
b. Beaker B
c. Beaker C
d. Trick questions, RBCs cannot burst
e. It will burst in all of the beakers because RBC are very fragile - ANSWER-C
A scientist who wants to study the effects of fertilizer on plants sets up an experiment
where plant A gets only water, Plant B gets 5 mg of fertilizer and water, and plant C gets
10 mg of fertilizer and water. Which plant represents the control group?
a. Plant A
b. Plant B
c. Plant C
d. There is no control because all of the plants got water
e. Plants B and C because they got both fertilizer and water - ANSWER-A
A template DNA strand contains the sequence 5'-ATGCTGAC-3'. The corresponding
sequence in the mRNA transcript is:
a. 5'-GUCAGCAU-3'
b. 5'-TACGACTG-3'
c. 5'-GTCAGCAT-3'
d. 5'-UACGACUG-3'
e. 3'-TACGACTG-5' - ANSWER-A
A(n) ___________ bond occurs between two oppositely charged ions.
a. Polar covalent
b. Ionic
c. Nonpolar covalent
d. Van der Waals
e. Hydrogen - ANSWER-B
A(n) ______________ is a scientific statement that can be tested.
a. Hypothesis
b. Observation
c. Experiment
d. Conclusion
e. Belief - ANSWER-
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