Biotechnology
GATE BT purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 101–110 of 650. Imported answers require independent review unless marked reviewed.
Question 36
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Correctly match the Microorganisms with their respective Nutrition and energy requirement.
Microorganisms | Nutrition and energy requirement |
|---|---|
P. Photoautotrophs | 1. Use organic compounds as a source of energy, hydrogen, electron and carbon |
Q. Chemoorganotrophs | 2. Use light energy and use CO₂ as their carbon source |
R. Chemolithoautotrophs | 3. Use light energy and use organic compounds as electron donor and carbon source |
S. Photoorganoheterotrophs | 4. Oxidise reduced-inorganic molecules as energy and electron source but derive carbon from organic sources |
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Correctly match the Inhibitor with its respective Function in mitochondrial respiration.
Inhibitor | Function |
|---|---|
P. FCCP | 1. Inhibits cytochrome c oxidase |
Q. Cyanide | 2. Makes the membrane permeable to protons |
R. Oligomycin A | 3. Blocks mitochondrial uptake of succinate |
S. Butyl malonate | 4. Inhibits ATP synthase |
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An octapeptide composed of these L-amino acids — Lys, Thr, Ser, Met, Arg, Trp, Tyr, Glu — was subjected to analyses with the following outcomes:
P. The N-terminal sequencing analysis by Sanger’s method yielded ‘Ser’ at the N-terminus
Q. Chymotrypsin treatment gave a pentapeptide, a ‘Tyr’ containing dipeptide and a free ‘Glu’
R. Cyanogen bromide treatment gave two tetrapeptides
S. Trypsin treatment gave two tripeptides and a dipeptide
Which one of the following is the correct octapeptide sequence?
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Correctly match the type of Hypersensitivity reaction with its respective Example.
| Hypersensitivity reaction | Example |
| P. Type I | 1. Tuberculin reaction |
| Q. Type II | 2. Arthus reaction |
| R. Type III | 3. Chronic urticaria |
| S. Type IV | 4. Systemic anaphylaxis |
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Correctly match the Enzyme with its respective Function.
| Enzyme | Function |
| P. Gyrase | 1. Removes a damaged base by cleaving the bond between sugar and base |
| Q. Deadenylase | 2. Provides a swivel allowing one DNA strand to rotate around the other |
| R. Glycosylase | 3. Catalyses bond formation between 3′-OH and 5′-phosphate end of nucleotides in duplex DNA |
| S. DNA ligase | 4. Is an exonuclease that removes the poly(A) tail |
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Correctly match the Coenzyme with its respective involvement in a specific Reaction type.
Coenzyme | Reaction type |
|---|---|
P. Thiamine pyophosphate | 1. Acyl group transfer |
Q. Tetrahydrofolate | 2. Transfer of one carbon group |
R. Flavin adenine dinucleotide | 3. Transfer of methyl group |
S. 5′-Deoxyadenosyl cobalamin | 4. Oxidation-reduction |
| 5. Aldehyde transfer |
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A thermometer measuring body temperature follows a first-order response with a time constant of 40 seconds. The instrument will reach 95% of its steady-state output at __________ seconds.
(Round off to the nearest integer)
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The output
of a first-order process is governed by the following differential equation
where
is a non-zero time constant,
is the gain and
is the input with
.Assume
. The transfer function for this process (consider
as the independent variable in the Laplace domain)Your answerChoose one option.
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For a specific bioreactor configuration, the power requirement for a Rushton-turbine impeller agitating an unaerated Newtonian fluid in the turbulent regime will be
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Let
and
be fixed real numbers. If the function
is a solution of
for any constants
and
, then
is equal toYour answerChoose one option.
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