List of top Environmental Sciences Questions on Genetic Material

The lytic cycle in the transduction process refers to:

Which of the following moderate the functions of the respiratory rhythm to suit the demands of the body tissue?

Which of the following are the regions of transcription unit? A. A promoter B. The structural gene C. Introns D. tRNA E. A Terminator

Arrange the following steps of DNA replication in E. coli in a correct sequence: A. Formation of Okazaki fragments which are of 1000 to 2000 nucleotides B. Helicase unwinds the helix with the help of topoisomerase like DNA Gyrase C. DNA polymerase I or RNase H removes the RNA primer and polymerase I synthesizes complementary DNA to fill the gap D. A special RNA polymerase ‘primase' synthesizes a short RNA primer complementary to DNA E. Fragments are joined by the enzyme DNA ligase

If a tall plant with TT genotype is crossed with Dwarf plant with tt genotype. What will be the genotypic ratio of TT : Tt : tt in F$_2$ generation respectively, when the F$_1$ progeny is allowed for selfing?

Match the enzymes with their functions in DNA replication:

List I	List II
A. Topoisomerase --- III. Helps to relieve the twisting strain ahead of the replication fork B. Helicases --- I. Unwinds the double helix at the replication fork, separating the parental strands C. DNA polymerase --- IV. Catalyzes the synthesis of new DNA by adding nucleotides D. DNA ligase --- II. Joining the sugar phosphate backbones of all the Okazaki fragments	III. Helps to relieve the twisting strain ahead of the replication fork I. Unwinds the double helix at the replication fork, separating the parental strands IV. Catalyzes the synthesis of new DNA by adding nucleotides II. Joining the sugar phosphate backbones of all the Okazaki fragments

Which of the following codons are called nonsense codons?

Match List I with List II:

LIST I	LIST II
A. Ligase	I. Reduce topological strain
B. Helicase	II. Adds phosphate group
C. Gyrase	III. Joins two open ends of DNA
D. Kinase	IV. Unwinds the DNA

Choose the correct answer from the options given below:

Which of the following organelles contains DNA?

Which of the following structure cannot be taken by the single subunit protein?

Choose the correct statements:
Statements:
A. In sickle cell anemia, a valine is substituted for the glutamic acid at a location on the surface of the protein near the oxygen-binding site.
B. The red blood cells of people who are homozygous for the sickle cell allele collapse into sickled shape when the oxygen level in the blood is low.
C. Individuals who are heterozygous for the recessive valine-specifying allele are said to possess the sickle cell trait.
Choose the correct answer from the options given below:

Which of the following is an example of a condition caused by chromosomal abnormality?