Which of the following statements are incorrect with respect to nucleotides ?
(A) Purines and pyrimidines are nitrogenous bases.
(B) Nucleotides are non-enzymatic molecules.
(C) Phosphate group is linked to - OH of 5' C of a nucleoside through phosphoester linkage.
(D) In RNA, every nucleotide residue has an additional — OH group present at 2' position in the ribose.
(E) Thymine is an example of Pyrimidine.
Choose the correct answer from the options given below:

Match Column ‘A’ with Column ‘B’ and select the suitable answer from the codes given below:

Which of the following statement(s) is/are correct?

{i}Collagen is the most abundant protein in animals.
{ii}RuBisCO is the most abundant protein in plants.
{iii}Z-DNA is the most common double helical structure found in nature.

Match Column I (taxonomic rank) with Column II (example/term) and choose the correct code.

Given below are two columns:
Column I lists the names of scientists and Column II lists the discoveries made by them towards understanding photosynthesis in plants.
Match the scientists with the corresponding discoveries and choose the correct code.

Match the components of the Electron Transport System (ETS) of aerobic respiration with their respective electron carriers.

Observe the columns and match the plants/types in Column I to the morphological forms in Column II.

Choose the correct answer from the codes given below:

Hormones secreted by the placenta to maintain pregnancy are:

Which neurotransmitter is involved in the transmission of impulse at the neuromuscular junction?

Calcium level in blood is regulated by:

Match Column ‘A’ with Column ‘B’ and select the suitable answer from the codes given below: