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Online Biochemistry Test - Biochemistry Test - Random

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  • 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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  • All the best!

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.
In which of the following cell organelles, it is expected to find the biochemical reactions that harness energy from the breakdown of sugar molecules to synthesize large amounts of ATP?
Lysosome
Vesicles
Mitochondria
Plasma membrane
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Learn more problems on : Cell Structure and Compartments
2.
Which of the following two organelles look most alike structurally?
Nucleus and vesicle
Golgi apparatus and smooth endoplasmic reticulum ER
Vacuole and cytoskeleton
Lysosome and chloroplast
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Learn more problems on : Cell Structure and Compartments
3.
Stereo chemical configuration of all a-amino acids derived from proteins is
L
D
L and D
None of these
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Learn more problems on : Structure and Properties of Amino Acids
4.
Which of the following amino acid is known as half-cystine residue?
Cysteine
Isoleucine
Valine
Histidine
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Learn more problems on : Structure and Properties of Amino Acids
5.
How many different amino acids are there?
3
20
100
An infinite number
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Learn more problems on : Structure and Properties of Amino Acids
6.
In animals, blood clots serve the function of
consuming invading organisms
helping them match the background coloration of the habitat
stimulating production of killer T lymphocytes
repairing damage to the body wall
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Learn more problems on : Immune System
7.
Two key organizing principles for large multicellular organisms are
prokaryotic cell structure and cell specialization
cell specialization and communication between cells
communication between cells and simple nerve reflexes
simple nerve reflexes and cell specialization
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Learn more problems on : Cell Signalling and Transduction
8.
Which of the following is true about a hydrophilic signaling molecule?
Its receptor is located in the cytosol of the target cell
It might trigger a signal cascade that causes some effect in a cell
Since it can enter the cell, it directly affects some specific cell process
It is a steroid
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Learn more problems on : Cell Signalling and Transduction
9.
Klenow fragment without free nucleotides exhibits
exonuclease activity
endonuclease activity
nickase activity
no activity
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Learn more problems on : DNA Structure and Replication
10.
The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed
start codons.
oriC regions.
Shine Dalgarno sequences.
promoters.
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Learn more problems on : Transcription and Regulation
11.
Transcription factors are
regions of DNA in the promoter area
regions of DNA in the enhancer area
any protein which binds to DNA
proteins which bind DNAand initiate transcription
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Learn more problems on : Genetic Regulation Prokaryotes
12.
Hydrolysis of lactose yields
galactose and fructose
galactose and glucose
glucose and fructose
fructose and galactose
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Learn more problems on : Carbohydrate
13.
Cholestrol is the precursor of
steroid hormones
vitamin A
bile salts
both (a) and (c)
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Learn more problems on : Lipid
14.
Where do the protons come from that make up the proton gradient used in the light reactions of photosynthesis?
Glucose
ATP
H2O
NADPH
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Learn more problems on : Photosynthesis and Respiration
15.
Acyl carrier protein (ACP) plays an important role in the biosynthesis of
fatty acids
amino acids
sugars
carbohydrates
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Learn more problems on : Vitamins and Coenzymes
16.
Which of the following is necessary for the clotting of blood, functions of certain enzymes and control of fluids through cell membranes?
Calcium
Magnesium
Copper
Cobalt
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Learn more problems on : Minerals
17.
In FT-NMR, how are nuclei excited?
By radio-frequency radiation whose frequency is swept across a predetermined range
By an intense pulse of radiation which contains a wide range of frequencies
By an intense pressure
None of the above
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Learn more problems on : FT IR Spectroscopy
18.
What does the retention factor, k', describe?
The distribution of an analyte between the stationary and the mobile phase
The migration rate of an analyte through a column
The velocity of the mobile phase
All of these
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Learn more problems on : Gas Chromatography
19.
What useful information can be found from a Van Deemter plot?
The selectivity factor
Optimum mobile phase flow rate
Optimum column temperature
Optimum column length
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Learn more problems on : Gas Chromatography
20.
In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as
mutational
semiconservative
discontinuous
antiparallel
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Learn more problems on : DNA Structure and Replication
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