NEET Botany Molecular Basis of Inheritance Class 12 Questions

Select the incorrect pair w.r.t. Lac operon.

The backbone in a polynucleotide chain is formed due to

In RNA, every nucleotide residue has an additional -OH group at which of the following position

Which one statement regarding "Okazaki fragment" is correct:

With regard to mature mRNA in eukaryotes:

In Hershey – Chase experiment, the virus which had radioactive DNA had

Genetic code consists of

The core of nucleosome is made up of two units each of

Which enzyme caused no transformation in Avery, MacLeod and McCarty's experiment?

Which one of the following pairs of nitrogenous bases of nucleic acids, is WRONGLY matched with the category mentioned against it?

The following ratio is always unity, according to chargaff rule?

Find out the incorrect statement from the following.

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

Assertion (A): The transcription and translation can be coupled in bacteria. Reason (R): In bacteria, the mRNA does not require any processing to become active, and also both transcription and translation take place in cytoplasm.

All of the following are synthesised by RNA polymerase I in eukaryotes, except;

The mRNA sequence generated from the coding strand with the sequence given below will be; 5’ ATGTGTGACTGATGAC 3’

The experimental proof for semi-conservative replication of DNA in chromosomes by Taylor et. al. was shown in

Consider the following statements: (a) Methyl guanosine triphosphate is added to 5' end of hnRNA. (b) A segment of DNA coding for polypeptide is Intron. (c) rRNA provides template for synthesis of proteins. (d) RNA polymerase I transcribes rRNA (e) Rho factor binds to RNA polymerase to terminate transcription.

Statement - I: The DNA polymerases on their own can not initiate the process of replication. Statement-II: In addition on to DNA dependent DNA polymerases, many additional enzymes are required to complete the process of replication with high degree of accuracy.

In the lac operon system, permease is coded by

What is another chemical name for thymine

The nucleosomes constitute the repeating unit of a structure in nucleus called

In transcription in eukaryotes, rRNA is transcribed by?

Given below are two statements Statement I: The bacteriophage attaches to the bacteria and its protein then enters the bacterial cell. Statement II: In Hershey and chase experiment the viruses grown on sulfur contained radioactive protein but not radioactive DNA because DNA does not contain sulfur. Choose the correct answer from the option given below:

Given below are assertion and reason. Mark the correct choice from given options: Assertion: Nucleic acid is the genetic material of all organisms with some exception. Reason: In majority of organisms this is ribonucleic acid or RNA.

Which of the following statements is correct regarding eukaryotic translation?

What is the role of lactose in the regulation of the lac operon?

What is the role of the transforming principle identified in the experiments with heat-killed S strain and live R strain bacteria?

What is the primary function of DNA in living organisms?

What is the estimated total number of genes in the human genome according to the Human Genome Project?

What is added to the 5' end of hnRNA during the capping process?

What is the estimated total number of genes in the human genome?

Which strand of DNA acts as the template during transcription?

What is the main function of lactose in the regulation of the lac operon?

What type of structural genes are mostly found in eukaryotes?

What did the heat-killed S strain bacteria enable the R strain to synthesize, leading to its virulence?

What is the function of tRNA in the process of translation?

Which of the following statements about DNA and genetic information is correct?

Which of the following statements about the molecular basis of inheritance is correct?

Which of the following statements about the molecular basis of inheritance is correct?

Which of the following statements about DNA and RNA is correct?

Which of the following statements about RNA and DNA is correct?

Which of the following statements about RNA polymerase and transcription is correct?

Which combination of statements about DNA and its functions is correct?

Which of the following statements about transcription and gene structure is correct?

Assertion (A): DNA is the predominant genetic material in most organisms. | Reason (R): DNA is more chemically and structurally stable than RNA.

Assertion (A): The coding strand of DNA has the same sequence as the RNA transcript. | Reason (R): The coding strand is involved in the polymerization process during transcription.

Assertion (A): Euchromatin is transcriptionally active chromatin. | Reason (R): Euchromatin is more densely packed and stains dark.

What are the sequences that appear in mature or processed RNA called?

Which molecule is considered the first genetic material?