List of top Biology Questions asked in IIT JAM BT

Which one of the following statements about polyploidy is correct?
The restriction map of a circular plasmid is shown below, along with the indicated distances between the restriction sites.
The plasmid was completely digested with EcoRI, and XhoI. The products were analysed by agarose gel electrophoresis followed by ethidium bromide staining. The number of bands that will be visible in the gel when exposed to UV light is __________.
The plasmid was completely digested with EcoRI, and XhoI. The products were analysed by agarose gel electrophoresis followed by ethidium bromide staining. The number of bands that will be visible in the gel when exposed to UV light is __________.
Which one of the following genetic crosses and their results indicates cytoplasmic inheritance?
Consider an enzyme that follows simple Michaelis-Menten kinetics, and has a $ 𝐾_𝑀 of 5 ¡𝑀$. The initial velocity of the reaction will be 10% of the maximum velocity at a substrate concentration of ¡𝑀 (rounded off to two decimal places).
A population of 1000 plants are in Hardy-Weinberg equilibrium. Two alleles R and r determine a particular trait in this population. If the number of plants with RR genotype is 640, Rr genotype is 320 and rr genotype is 40, the frequency of r allele (in percentage) in this population is __________/ (rounded off to the nearest integer).
A bacterial cell suspension contains $2 x 10^5 $ 𝑐𝑒𝑙𝑙𝑠 π‘šπΏ^{βˆ’1}. The volume of this suspension required to obtain $1.4 x 10^6$ 𝑐𝑒𝑙𝑙𝑠 is ________ π‘šπΏ (rounded off to the nearest integer).
Three genes x, y, and z are located on a chromosome in a linear order. If the recombination frequencies between x and y is 0.15, and between y and z is 0.10, then the expected frequency of double crossovers is __________(rounded off to three decimal places).
Which of the following is/are true about Retrovirus?
Which of the following is/are trace element(s)?
Which of the following entity(ies) is/are found inside the intact nucleus of eukaryotic cells?
Which of the following statement(s) about the effect of genetic drift is/are correct?
Which of the following method(s) is/are used to estimate protein concentration?
Which of the following statement(s) about eukaryotic DNA topoisomerase is/are correct?
Which of the following statement(s) about Golden Rice is/are correct?
Which of the following is/are lateral meristems?
Chromosome duplication during the cell cycle occurs in
In chick embryo, the ectoderm generates
Genes in two species that are derived from the same ancestral gene in their most recent common ancestor are called
Metabolic acidosis is associated with decreased plasma level of
Which one of the following is NOT used as a component in subunit vaccines?
Adenine constitutes 0.16 mole fraction in a given single-stranded DNA. What is the mole fraction of uracil in the resultant RNA, if this entire DNA fragment is transcribed?
Competition between two populations in an ecosystem is
Which of the following is NOT a characteristic morphological feature of apoptotic cells?
Match the morphology in Group I with the corresponding microorganism in Group II
Group IGroup II
P. Coccus1. Treponema
Q. Rod2. Bacillus
R. Comma3. Neisseria
S. Spiral4. Vibrio
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
Assertion [a]: The resolving power of a transmission electron microscope is higher than that of the light microscope.
Reason [r]: The wavelength of electrons is shorter than that of visible light.