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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.
  • DO NOT refresh the page.
  • 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.
Which of the following character does not apply to water?
The water molecule is asymmetric
The water molecule readily forms hydrophobic interactions
The covalent bonds in water are highly polarized
All three atoms in the water molecule readily form hydrogen bonds
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Learn more problems on : Water, pH and Macromolecules
2.
Most of the important functional groups in biological molecules contain
oxygen and/or nitrogen and are acidic
oxygen and a phosphate
nitrogen and a phosphate
oxygen and/or nitrogen and are polar
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Learn more problems on : Water, pH and Macromolecules
3.
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
4.
Which of the following is not part of the vertebrate immune system?
Lymphocytes
Antibodies
Cardiac glycosides
Lymph nodes
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Learn more problems on : Immune System
5.
Papain digest IgG into
two Fab fragments and one Fc fragment
three Fab fragments and two Fc fragments
two Fab fragments and two Fc fragments
three Fab fragments and three Fc fragments
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Learn more problems on : Anti Bodies
6.
Which of the following is not found in membranes?
Glycoproteins
Glycolipids
Nucleic acids
Phospholipids
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Learn more problems on : Membrane Structure and Functions
7.
A purine with an amine (NH2) group on the 6th carbon is
adenine
cytosine
thymine
guanine
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Learn more problems on : Nucleic Acids
8.
What is the approximate size (in kb) of the E. coli genome?
3000 kilobase
4500 kilobase
5500 kilobase
6500 kilobase
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Learn more problems on : DNA Structure and Replication
9.
How many different codons are possible?
3
20
64
An infinite number
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Learn more problems on : Genetic Code and Regulation
10.
In prokaryotes, AUG encodes
methionine
N-formyl methionine
a stop codon
alanine
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Learn more problems on : Genetic Code and Regulation
11.
Which of the following amino acid starts all proteins synthesis?
Glycine
Proline
Thymine
Methionine
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Learn more problems on : Protein Synthesis
12.
Beta pleated sheets are examples of protein's
primary structure
secondary structure
tertiary structure
quaternary structure
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Learn more problems on : Protein Structure
13.
Pyruvate is initially converted to which of the following in the gluconeogenesis?
Glycerol
Phosphoenol pyruvate
Oxaloacetate
Acetyl CoA
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Learn more problems on : Carbohydrate
14.
The irreversibility of the thiokinase reactions (formation of initial acyl-CoA)
make this activation reaction the committed step on the pathway
is due to the subsequent hydrolysis of the product
applies only to even-chain fatty acids
both (a) and (b)
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Learn more problems on : ATP Synthesis and Fatty Acid Oxidation
15.
Malate-asparatate shuttle operates in
lungs and liver
heart and liver
pancreas and liver
none of these
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Learn more problems on : TCA Cycle
16.
Energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as
CO2
AMP
ADP
heat
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Learn more problems on : TCA Cycle
17.
Oxidation of a molecule involves
gain of electron
loss of electron
gain of proton
loss of proton
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Learn more problems on : TCA Cycle
18.
Which one of the following is a product of both cyclic and noncyclic photophosphorylation?
NADPH
O2
ATP
Carbohydrate
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Learn more problems on : Photosynthesis and Respiration
19.
Lipoic acid is a co-factor of the
pyruvic dehydrogenase
α-ketoglutaric dehydrogenase
both (a) and (b)
di-hydroorotate dehydrogenase
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Learn more problems on : Vitamins and Coenzymes
20.
Wilson's disease is an example of __________ and Menkes' syndrome is an example of __________ .
zinc deficiency; zinc toxicity
zinc toxicity; zinc deficiency
copper deficiency; copper toxicity
copper toxicity; copper deficiency
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Learn more problems on : Minerals
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