The DNAstrand with 3'-5' polarity only is trancribed and not the other because the RNA-polymerase can polymerize RNA only in 5'-3' direction.

Sometimes cattle or human beings give birth to their young ones that are having different sets of oranges like limbs/position of eye, etc.It happens due to the disturbance in coordinated regulation of expression in sets of genes, which are associated with organ development

1. Functional mRNA of structural genes need not always include all of its exons.This alternate splicing of exons is sex-specific , issue-specific and even development stage-specific.
2. By such alternate splicing of exons, a single gene may encode for several ios proteins and/ or proteins of similar class.In absence of such a kind od splicing, there should have been new genes for every protein/isoprotein.Such an extravagance has been avoided in natural phenomena by alternative splicing.

A polynucleotide chain comprises of a long chain of nucleotides joined by 3'-5' phosphodiester linkages.Such a polymer has at one a free phosphate moiety at 5'-end of ribose sugar.This end of polymer is referred to as 5'-end.Similarly, at the other end of the polymer, the pentose sugar has a free 3'-OH group.This end of polymer is referred to as 3'-end.

(a)Correct
(b)The genetic code is non-ambiguous
(c)The genetic code is degenerate
(d)Transfer RNA(tRNA) carry amino acids to mRNA codons and used again and again in translation
(e)Correct
(f)Correct

The core part of nucleosome comprises of 8 Histone molecules.DNA molecules is negatively charged whereas histone octomer is positively charged.Therefore, negatively charged DNA binds with the positively charged histone octomer

The template strand as 3'-TACGTAGTACGTTAGTCC-5' and the coding strand reads as 5'-ATGCATGCATGCAATCAGG-3' Therefore,the total number of Thymine are=10.
The Carboxyl group(-COOH) of one amino acids reacts with an amino group(-NH₂)of other amino acid to form a peptide bond(-CO-NH).Make a peptide bond between the two amino acids by removing water molecule in the given figure

  

The 3' end of template DNA (parental strand) starts the 5' of the newly synthesised DNA.Therefore, a primer of 5 base required to start DNA replication will be-5'-GACCU

(a) Continuous synthesis of DNA
(b) Discontinuous synthesis of DNA

1.Both the strands of parent DNA function as template strands.
2. On the template strand with \({ 3 }^{ ' }\longrightarrow { 5 }^{ ' }\) polarity, the new strand is synthesised as a continuous stretch as the DNA polymerase can carry out polymerisation of the nucleotides only in \({ 5 }^{ ' }\longrightarrow { 3 }^{ ' }\)direction; this is called continuous synthesis and the strand is called leading strand.
3. On the other template strand with \({ 5 }^{ ' }\longrightarrow { 3 }^{ ' }\) polarity, the new strand is synthesised from the point of replication fork, also in \({ 5 }^{ ' }\longrightarrow { 3 }^{ ' }\) direction, but in short stretches; they are later joined by DNA - ligases to form a strand, called lagging strand.