List of practice Questions

Thermostable DNA polymerase (Taq Polymerase) enzyme is isolated from the following bacterium:
Match the following:
Diseases with Host Plants and Pathogens
Study the following and pick the correct statements:
(A) A biogeographic region with a significant reservoir of biodiversity that is under threat of extinction from humans is called a biosphere reserve.
(B) Cryopreservation, in-vitro culture, gene banks, etc., are some methods of ex-situ conservation.
(C) Species diversity between two adjacent ecosystems is called beta (β) diversity.
(D) Digitalin is obtained from the Foxglove plant.
Maintenance of relatively constant internal conditions different from the surrounding environment is called:
Assertion (A): Some adult gastropods (e.g., snail) are asymmetrical.
Reason (R): Torsion takes place during the development of gastropods.
The table given below is related to the checkerboard of dihybrid F\(_2\) progeny of Mendel’s experiment. Identify the correct combinations:
Dihybrid Cross and Phenotypes
Assertion (A): Beggiatoa is not a chemoautotrophic bacterium.
Reason (R): Chemoautotrophic bacteria derive carbon from CO\(_2\) and energy from oxidation of inorganic compounds.
In Morgan’s experiments on linkage in Drosophila, the percentage of white-eyed, miniature-winged recombinants in the F\(_2\) generation is:
Match the following:
Genome Sizes
Identify the correct definitions of the following molecular biology terms:
I. Splicing = Removal of introns
II. Capping = Addition of unusual methyl guanosine triphosphate added to 5" end of hn RNA
III. Tailing = Deletion of adenylate residues at 3'end of hn RNA
IV. Anticodon= Specifies termination of polynucleotide chain
Given is the schematic structure of the transcription unit. Select the correct answer regarding A, B, C, and D:
transcription unit.
In C\(_4\) plants, the Oxaloacetic acid is formed by this reaction:
Identify the correct sentences regarding the role of physiological responses of phytohormones:
I. Ethylene initiates sprouting of potato tubers
II. Gibberellins promote senescence
III. Auxins promote flowering in pineapple
IV, Abscisic acid inhibits seed germination
Match the following:
Carbon Counting in Organic Acids
Substrate-level phosphorylation does not occur in the following reactions of aerobic respiration:
Match the following:
Microbial Products
Identify the correct combinations:
Dominant and Recessive Traits
The site of transcription and translation in eukaryotic cells are respectively:
Identify the correct statement with reference to the diagram given below:
Understanding Water Potential
Identify the incorrect pair:
(A) Casuarina — Succulent root — Phylloclade
(B) Asparagus — Succulent leaf — Phylloclade
(C) Opuntia — Succulent stem — Phylloclade
(D) Aloe — Succulent leaf — Xerophyte
Assertion (A): Disulphide bridges help in stabilization of protein structure.
Reason (R): Sulphur forms disulphide bridges in the quaternary structure of proteins.
Match the following:
Enzyme Activation by Elements
Per one Calvin cycle, the number of CO\(_2\) molecules fixed, ATP utilized, and the number of Glucose, NADPH molecules produced respectively are:
Match the following:
Scientific Names and Common Names
In one helix of DNA, minimum and maximum number of hydrogen bonds present between nitrogen bases: