AIPMT-PRELIMS Botany Molecular Basis of Inheritance Class 12 Questions

Removal of introns and joining of exons in a defined order during transcription in called

The most abundant prokaryotes helpful to humans in marking curd from milk and in production of antibiotics are the ones categorised as

Which one of the following is not a part of a transcription unit in DNA?

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

Removal of RNA polymerase III from nucleoplasm will affect the synthesis of

Mutations can be induced with:

Which one of the following also acts as a catalyst in a bacterial cell?

Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5’ ——— GAATTC ——— 3’ 3’ ——— CTTAAG ——— 5’

The most specific characteristic of genetic code, is its being

Satellite DNA is useful tool in

Select the two correct statements out of the four (a–d) given below about lac operon.

What is not true for genetic code?

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a “triplet”?

Point mutation involves:

The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:

Polysome is formed by:

In the DNA molecule:

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

Haploids are more suitable for mutation studies than the diploids. This is because:

The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?

A sequential expression of a set of human genes

During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?

Differentiation of organs and tissues in a developing organism, is associated with

Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they

Molecular basis of organ differentiation depends on the modulation in transcription by

The two polynucleotide chains in DNA are

Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?

Amino acid sequence, in protein synthesis is decided by the sequence of:

One turn of the helix in a B⁻form DNA is approximately :

Antiparallel strands of a DNA molecule means that :

Telomerase is an enzyme which is a:

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called?

E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:

Production of a human protein in bacteria by genetic engineering is possible because:

Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by:

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used:

DNA fingerprinting refers to :-

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be -

In a mutational event, when adenine is replaced by guanine, it is a case of -

During replication of a bacterial chromosomes DNA synthesis starts from a replication origin site and :-

After a mutation at a genetic locus the character of an organism changes due to the change in :-

Which form of RNA has a structure resembling clover leaf ?

During translation initiation in prokaryotes, a GTP molecule is needed in :-

In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids :-

What does "lac" refer to in what we call the lac operon :-

Degeneration of a genetic code is attributed to the :-

During transcription, the DNA site at which RNA polymerase binds is called :-

What would happen if in a gene encoding a polypeptide of 50 amino acids, 25^{th} codon (UAU) is mutated to UAA :-

Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' codon :-

Genetic Map is one that : -