Answer: Option A. -> True
:
A
Deletion mutation is the one in which one or a few bases get deleted from the gene. If the number of deleted bases happens to be 1, 2 or any non-multiple of 3, it can cause a frameshift mutation.

Answer: Option A. -> Terminating the process of protein synthesis
:
A
Nonsense codons are those that terminate the translation process since there are no corresponding tRNA molecules with anticodons for them. They are also called stop codons and there are three of them: UAA, UAG, UGA.

Answer: Option B. -> sequence all the DNA base pairs in the genome 
:
B
Genomeis an organism's complete set of DNA, including all of its genes. The genomecontains all of the information needed to build and maintain that organism. Each organism has different numbers of genes according to their physiological needs.
The maingoalsof theHuman Genome Projectwere to provide a complete and accurate sequence of the 3 billion DNA base pairs that make up thehuman genomeand to find all of the estimated 20,000 to 25,000humangenes.

Answer: Option A. -> p - ii, q - iii, r - i, s - iv
:
A
Watson and Crick are known for the double helical model of DNA that they constructed. Griffith’s transformation experiments revealed that a “transforming principle” from heat-killed S strain of pneumococcal bacteria could transform the R strain into the live S strain. Avery, MacLeod and McCarty figured out that DNA isthe “transforming principle”. Hershey and Chase, through a cleverly developed experiment, re-confirmed that DNA, and not protein, is the genetic material in most organisms.

:
DNA polymerase can add nucleotides only to the free 3’ end of RNA primers. Thus it works exclusively in the 5’$\to$3’ direction, which basically means that DNA replication follows the 5’$\to$3’ direction.

Answer: Option B. -> Tobacco Mosaic Virus 
:
B
Tobacco mosaic virusis a rodlike virus. TMV capsids are composed of identical protein subunits, which assemble around the viral ssRNA to form a helical structure, with a hollow central cavity.

Answer: Option B. -> DNA has Thymine and RNA has Uracil
:
B
There are three types of pyrimidines - Cytosine, Thymine and Uracil. DNA has Cytosine and Thymine, while RNA has Cytosine and Uracil.

Answer: Option B. -> Nucleotides
:
B
Nucleic acids are biological macromolecules which are polymers of repeating monomeric units called nucleotides. A single nucleotide includes a nitrogenous base, a sugar molecule, and a phosphate group. A nitrogenous base with a sugar molecule alone makes up a nucleoside.

Answer: Option B. -> Promoter
:
B
Introns and exons are formed in a process called post-transcriptional modification. This takes place after transcription is carried out. Therefore before transcription, they are found combined together and are collectively known as the RNA coding region or the Gene. The terminator sequence is also required for the RNA polymerase to stop copying things down and hence included in the transcription unit, although it does not form a part of the structural or core Gene. The promoter however, is present on the strand just to help RNA polymerase recognise the transcription unit. In some cases still, RNA polymerase will be bound to the promoter and another part of the transcription unit, like a repressor, will be blocking its activity, as is the case in the Lac Operon.

Answer: Option D. -> Virus that infects bacteria
:
D
A bacteriophage is a type of virus that infects bacteria. It acts as a medium of gene transfer among bacteria by the process called transduction (phage-mediated gene transfer).