Life Sciences
GATE XL exam:gate PYQs
Build your understanding with focused practice from past exam papers.
Questions 521–530 of 1235. Imported answers require independent review unless marked reviewed.
Question 33
Open questionXL-QNAT1 markNeeds review
The pKₐ values of the carboxyl and amino groups of an amino acid with a non-ionizable side chain are 2.17 and 9.13, respectively. The isoelectric point (rounded off to two places of decimals) of this amino acid is _____.
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Open questionXL-QNAT1 markNeeds review
The number of ATP molecules required for the complete assimilation of one molecule of CO₂ in Calvin cycle is _____.
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Open questionXL-QNAT1 markNeeds review
The absorbance of a 5 × 10⁻⁴ M solution of tyrosine at 280 nm wavelength is 0.75. The path length of the cuvette is 1 cm. The molar absorption coefficient at the given wavelength in M⁻¹ cm⁻¹, correct to the nearest integer, is _____.
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Open questionXL-QMCQ2 marksNeeds review
Filamentous photosynthetic algae were placed on a microscope slide and illuminated with light of different colors as illustrated.
The bacteria that are known to migrate towards the region of high
were also added uniformly on the slide. Which one of the following options illustrates the distribution of bacteria along the length of the microscopic slide after illumination?Your answerChoose one option.
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Open questionXL-QMCQ2 marksNeeds review
Two RNAs shown below were used separately as templates in an in vitro translation system, which can generate proteins in all possible reading frames.
:
:
The
translated product contained Arg and Glu.
The
translated product contained Arg, Glu, and Lys.Which one of the following codons directs the incorporation of Arg?
Your answerChoose one option.
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Open questionXL-QMCQ2 marksNeeds review
Which of the following statements about endogenous synthesis of insulin are correct?
P. Insulin is synthesized as preproinsulin.
Q. Preproinsulin is converted to proinsulin.
R. Single-site cleavage of proinsulin eliminates C chain.
S. Mature insulin consists of disulphide-linked A and B chains.
Your answerChoose one option.
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Open questionXL-QMCQ2 marksNeeds review
Which one of the following enzymes converts testosterone to estradiol?
Your answerChoose one option.
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Open questionXL-QMCQ2 marksNeeds review
Purification of 6×His-tagged protein using Ni-NTA column is an example of ________
Your answerChoose one option.
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Open questionXL-QMSQ2 marksNeeds review
Which of the following carbohydrates has/have a
glycosidic linkage?Your answerSelect all correct options. You can choose more than one.
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Open questionXL-QMSQ2 marksNeeds review
Which of the following statements about IgA is/are correct?
Your answerSelect all correct options. You can choose more than one.
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