Life Sciences
2025 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 91–93 of 122. Imported answers require review unless explicitly marked reviewed.
Question 91
Open questionXL-TNAT1 markNeeds review
Imagine a population of diploid species in Hardy-Weinberg equilibrium. The population has two alleles for a gene which are ‘a’ and ‘A’. The number of individuals with ‘aa’ genotype in this population is 1 in 1000. The frequency of the allele ‘A’ in the population is ______ (up to two decimal places)
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Open questionXL-TNAT1 markNeeds review
A PCR was setup to amplify a 500 nucleotides-long DNA. The dNTPs in the reaction mixture were labeled. The percentage (%) of radiolabeled single-stranded DNA after three cycles will be ______ (up to one decimal place)
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Open questionXL-TMCQ2 marksNeeds review
Match the molecules in Column-I with their properties/functions mentioned in Column-II
Column-I Column-II
P. IgM 1. Involved in antigen presentation
Q. IgE 2. Predominant antibody type in various body secretions
R. IgA 3. Can pass through placenta
S. MHC 4. Associated with allergic reaction
5. Contains ten heavy and light chains
Your answerChoose one option.
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