Molecular basis of inheritance practice · Mixed difficulty

How many types of histones form core part of nucleosome?

Through the experiments conducted by A. Hershey and M. Chase, it was provided that

There is no tRNA for codon which has sequence

In a DNA sample the proportion of ${A}$ is $17 \%$, the amount of ${G}+{T}$ and ${C}$ will be respectively.

Guanine is equimolar with cytosine. This statement is always true for

In gel electrophoresis, separated DNA fragments can be visualized with the help of

The human chromosome with the highest and least number of genes in them are respectively

There are many non human model organisms which genome have also been sequenced :

a. Drosophila

b. Yeast

c. Caenorhabditis elegans

d. Arabidopsis

DNA replicates semiconservatively for this experimental proof which of the following scientist performed the experiment :

a. Matthew Meselson $\quad$b. Griffith

c. Colin Macleod $\quad$d. Martha Chase $\quad$e. Taylor

One of the following is true, with respect to AUG

Which of the following cannot act as inducer?

A human gene product can be produced by genetically engineered bacteria. This is possible because the

During replication of DNA, Okazaki fragments are formed in the direction of

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?

The adapter molecules for tryptophan and first amino acid during polypeptide synthesis has anticodon sequence respectively

Radioactive thymidene is fed to cells about to enter S-phase. It will make radioactive

Peptidyl transferase activity

Assertion (A): Codon for methionine & tryptophan said to be degenerate.

Reason (R): Methionine and tryptophan amino acids coded by more than one codons.

Read the following statements and select the correct ones w.r.t. DNA structure.
A. Two nucleotides are linked through $3^{\prime}-5^{\prime}$ phosphodiester linkage.
B. Pyrimidine nucleosides have $1^{\prime}-1^{\prime}$ linkage.
C. Base pairing confers stability of DNA helix.
D. Purines are heterocyclic, 6 membered single ring structures.

The regions in chromatin which are lightly stained

Suppose, evolution on earth had occurred in such a way that there are 96 amino acids instead of 20. DNA has 12 different types of bases and DNA synthesis occurs in the same way as today. The minimum number of bases per DNA codon would be

In Lac operon, the product of ‘i’ gene binds to the operator

Assertion (A): The sequencing of chromosome-1 was completed at last in May-2006.

Reason (R): Chromosome-1 in the longest chromosome with maximum number of genes.

Mutation is due to?

Assertion (A): Lactose is the substrate for the enzyme $\beta$-galactosidase & it regulates switching on & off the operon.

Reason (R): A very low level of expression of lac operon is always present in cell the time.

Which form of RNA has a structure resembling clover leaf?

Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?

Assertion: In eukaryotes, the sequence of nucleotides of mRNA is same as that of template except for the difference of T and U.
Reason: In eukaryotes antisense strand is complementary to sense strand and mRNA is complementary to coding strand.

Given below is the percentage of nitrogenous bases present in four different samples of the genetic material. Identify, which sample belongs to an RNA virus

If the length of a DNA molecule is 1.1 metres, what will be the approximate number of base pairs?