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Online Biochemistry Test - Biochemistry Test - Random

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
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Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
The molecular formula for glycine is C2H5O2N. What would be the molecular formula for a linear oligomer made by linking ten glycine molecules together by condensation synthesis?
C20H50O20N10
C20H32O11N10
C20H40O10N10
C20H68O29N10
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Learn more problems on : Structure and Properties of Peptides
2.
The ability of an antigen to induce an immune response does not depend on the antigen's
ability to enter the thyroid
degree of aggregation
dose
size
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Learn more problems on : Antigen
3.
A polyclonal antibody response
is produced only in response to polymeric antigens
is produced by several B cells recognizing different pitopes on the same antigen
occurs during the lag phase of the immune response
violates clonal selection
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Learn more problems on : Anti Bodies
4.
To elicit the best antibodies to mouse MHC I, it should be injected into a
goat
mouse of the same genetic background (strain)
mouse of a different strain
rat
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Learn more problems on : Immune Response
5.
A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?
It is in the heart muscle
It is also the site of production for the signaling molecule
It contains the receptor for the signaling molecule
It is incapable of signal transduction
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Learn more problems on : Cell Signalling and Transduction
6.
The accepted hypothesis for DNA replication is
conservative theory
dispersive theory
semi-conservative theory
evolutionary theory
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Learn more problems on : DNA Structure and Replication
7.
Which of the following has been used as an evidence that primitive life forms lacked both DNA and enzymes?
RNA can both code genetic information and act as a catalyst
DNA and enzymes are only present in the most advanced cells
Advanced cells lack RNA
All of the above
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Learn more problems on : Genetic Code and Regulation
8.
Which of the following is carried out when cAMP functions as a second messenger?
Acts second in importance to AMP
Activates all cytosolic protein kinases
Activates the cAMP-dependent protein kinase
Acts outside the cell to influence cellular processes
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Learn more problems on : Carbohydrate
9.
VLDLs are synthesized in
blood
liver
intestine
pancreas
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Learn more problems on : Lipid
10.
Lactic acid is produced by human muscles during strenuous exercise because of lack of
oxygen
NAD+
glucose
ADP and Pi
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Learn more problems on : Oxidative Phosphorylation
11.
The end products of noncyclic photophosphorylation are
O2, ATP and NADPH
carbon dioxide, PGAL (phosphoglyceraldehyde), and H2
water, ADP and NADP+
carbon dioxide, ATP and water
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Learn more problems on : Photosynthesis and Respiration
12.
A eukaryotic cell that can carry out only fermentation instead of the complete aerobic respiration of glucose
produces less CO2
is lacking in O2
has mitochondria present
all of these
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Learn more problems on : Photosynthesis and Respiration
13.
If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?
In the water used
In the NADPH
In the carbohydrate produced
In the oxygen given off by the plant
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Learn more problems on : Photosynthesis and Respiration
14.
Which of these is a symptom of vitamin A deficiency?
Osteoporosis
Impaired taste perception
Blindness
Impaired blood clotting
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Learn more problems on : Vitamins and Coenzymes
15.
The mineral which is considered important in maintaining electrical potential in nerves and membranes is
magnesium
manganese
calcium
iron
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Learn more problems on : Minerals
16.
Which of the following ion is required for the development of sound teeth with resistance to tooth decay?
Fluoride ion
Sodium ion
Chloride ion
Magnesium ion
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Learn more problems on : Minerals
17.
Which of the following are short nucleotides strands made by DNA polymerase working in the opposite direction of the replication fork?
Leading strands
Okazaki fragments
Primers
Lagging strand
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Learn more problems on : DNA Structure and Replication
18.
What does ligase do during replication of DNA?
Synthesizes the lagging strand
Makes copies of mRNA from DNA
Joins nicks in DNA strands
Digests mRNA when it is no longer needed
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Learn more problems on : DNA Structure and Replication
19.
TM refers to the temperature at which
membranes are 50% fluid
50% of a DNA molecule is denatured
50% of a protein molecules are denatured
all of the above
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Learn more problems on : DNA Structure and Replication
20.
In an agarose gel, DNA is moving from
cathode to anode
left to right
anode to cathode
A to B
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Learn more problems on : DNA Structure and Replication
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