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Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:
Given below are two statements: Statement I: The release of sperms into the seminiferous tubules is called spermiation. Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below:
mRNA is synthesized on a DNA template in which direction:
Which enzyme(s) will be produced in a cell in which there is a non-sense mutation in the lac Y gene?
Satellite DNA is important because it:
If a DNA molecule is shortened by 25 base pairs, how many helical turns will be reduced from its structure?
The two polynucleotide chains in DNA are:
How many different proteins does the ribosome consist of?
Given below are two statements: Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. In the light of the above statements, choose the correct answer from the options given below:
The following ratio is generally constant for a given species:
DNA fingerprinting refers to:
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as:
Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?
E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then, it was made to replicate in a normal medium. Which of the following observation shall be correct?
Length of one loop of B-DNA:
The equivalent of a structural gene is:
DNA replication is semi-conservative in nature. This was experimentally proved in eukaryotes by:
Given below are two statements: Statement I: In eukaryotes, there are three RNA polymerases in the nucleus in addition to the RNA polymerase found in the organelle. Statement II: All the three RNA polymerases in eukaryotic nucleus have different roles. In the light of the above statements, choose the correct answer from the options given below:
Consider the following reaction and identify the product (P): [Specific Reaction Image Missing - Likely Reaction of 3-Methylbutan-2-ol with HBr]