Which of the following statements are false regarding 'Hershey and Chase' experiment, proving DNA is genetic material ?
(i) They made use of rats.
(ii) Radioactivity was seen in supernatant for the medium that was infected by phase radiolabeled with `.^(32)P`.
(iii) Used radioisotope to label sulphur with `.^(35)S` in sulphur- containing amino acids.
(iv) Radioactive phages were allowed to attach to E. coli bacteria.

To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in their experiments?

To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in their experiments?

To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in their experiments?

Which of the following statement/s regarding nucleic acids is/are wrong? I. Haploid content of human DNA is 3.3 xx 10^(9) bp . II. RNA is the genetic material for the majority of organisms. III. Both RNA and DNA can function as genetic material. IV. The bases in two strands of DNA are paired through disulphide bonds forming base pairs (bp). (V) In RNA, every nucleotide residue has an additional -OH group present at 2'-position in the ribose.

Assertion : Hershye and chase in their experiments , allowed the phages to infect bacteria in culture medium which contains the radioactive isotopes ""^(35)S or ""^(32)P . Reason: The bacteriophage that grew in the presence of ""^(35)S had labelled proteins and bacteriophages grown in presence of ""^(32)P had labeled DNA.

Which of the following statements are correct regarding the organelle, lysosome ? I. It contains enzymes mostly active in acidic pH. II. It is known as the suicidal bag . III. These organelles are directly derived from the endoplasmic reticulum . IV. It contains water , sap, excretory product and other materials not useful for the cell.

Which of the following statements are incorrect ? I. Term PCR is used for organisms, which carry foreign genes. II. SCID includes genetic disorders only. III. Cloning is the production of GMOs, e.g. Flaur saur tomato. IV. The bacteria use restriction endonucleases to destroy the DNA of invading foreign viruses.

Which of the following are not correct ? I. Van Neil showed that photosynthetic bacteria fixed CO_2 in the presence of H_2S . II. Melvin Calvin discovered C_4 -pathway for fixation of CO_2 . III. Park and Biggins discovered quantasome. IV. Emerson and Arnold used radioactive 18 oxygen and proved that oxygen evolved was part of water.

Which of the following statements are correct regarding the organelle, lysosome ? I. It contains enzymes mostly active in acidic pH. II. It is known as the suicidal bag . III. These organelles are directly derived from the endoplasmic reticulum . IV. It contains water , sap, excretory product and other materials not useful for the cell. (a) I , II ,III and IV (b) I and II only (c) II and III only (d) I, II and IV only