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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 is a nonprotein amino acid?
Dopamine
Hydroxylysine
Cystine
None of these
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Learn more problems on : Structure and Properties of Amino Acids
2.
In a gel filtration column
smaller proteins enter the beads more readily
large proteins elute first
both (a) and (b)
large proteins enter the beads more readily
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Learn more problems on : Gel Electrophoresis
3.
DNAs when charged, migrate in a gel towards the
positive pole
negative pole
will not migrate
none of these
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Learn more problems on : DNA Structure and Replication
4.
The sequence of one strand of DNA is: 5' ATTGCCA 3', what is the sequence of the other strand?
5' TAACGGT 3'
5' TGGCAAT 3'
5' ATTGCCA 3'
5' UAAGCCU3'
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Learn more problems on : Genetic Code and Regulation
5.
Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are
in the T Loop and D stem and loop
in the anticodon loop and D stem loop
in the anticodon loop and the 3' CCA end
none of the above
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Learn more problems on : RNA Structure
6.
Enhancers are regions that
bind RNA polymerase
are adjacent to the TATA box
are CAT box binding proteins
modulate transcription
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Learn more problems on : Transcription and Regulation
7.
The transcriptional regulatory proteins in eukaryotes which induce transcription usually have
at least two distinct domains of protein structure, a DNA binding domain and an activation domain
at least two distinct domains of protein structure and a DNA binding domain
at least one distinct domains of protein structure, a DNA binding domain and an activation domain
none of these
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Learn more problems on : Transcription and Regulation
8.
The site of protein synthesis is
Ribosome
Nucleus
Endoplasmic reticulum
Chromosome
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Learn more problems on : Protein Synthesis
9.
The pathway of a tRNA during polypeptide elongation on the ribosome is
A site → P site → E site
P site → entry site → exit site
A site → P site → entry site
P site → A site → E site
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Learn more problems on : Protein Synthesis
10.
The conversion of pyruvate to lactate is catalysed by
pyruvate carboxylase
lactate dehydrogenase
pyruvate dismutase
pyruvate decarboxylase
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Learn more problems on : Carbohydrate
11.
Phosphofructokinase, the major flux-controlling enzyme of glycolysis is allosterically inhibited and activated respectively by
ATP and PEP
AMP and Pi
ATP and ADP
Citrate and ATP
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Learn more problems on : Glycolysis
12.
Coenzyme Q is involved in electron transport as
directly to O2
a water-soluble electron donor
covalently attached cytochrome cofactor
a lipid-soluble electron carrier
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Learn more problems on : Oxidative Phosphorylation
13.
A biological redox reaction always involves
an oxidizing agent
a gain of electrons
a reducing agent
all of these
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Learn more problems on : Oxidative Phosphorylation
14.
Which of the following is the reduced form of a temporary electron carrier molecule?
FADH2
ATP
NADP+
CO2
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Learn more problems on : Photosynthesis and Respiration
15.
The vast majority of the molecules that act as energy carriers to power cellular activities are made in
the nucleus
the Golgi apparatus
the cytosol
the mitochondria and chloroplasts
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Learn more problems on : Photosynthesis and Respiration
16.
Which of the following statements about energy metabolism is false?
The energy that powers living systems ultimately comes from the sun
All animals in some way rely on plants for their energy
Plants provide the water and CO2 that animals need to carry out respiration
All eukaryotic organisms carry out respiration in the presence of O2
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Learn more problems on : Photosynthesis and Respiration
17.
Hydrogen (electron) acceptor in the light reactions is
ADP
NADP+
NAD+
FADH
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Learn more problems on : Photosynthesis and Respiration
18.
The followings are the products of the light reactions of photosynthesis except
ATP
oxygen
NADPH
glucose
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Learn more problems on : Photosynthesis and Respiration
19.
During the light-dependent reactions of photosynthesis, which of the following does not occur?
Splitting of water
Carbon dioxide fixation
Release of oxygen
Absorption of light energy by photosystems
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Learn more problems on : Photosynthesis and Respiration
20.
Which of the following structures or processes are logically associated with chloroplasts?
Plant cells
Chlorophyll
Thylakoid membranes
All of these
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Learn more problems on : Photosynthesis and Respiration
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