Daily NEET MCQ- March 14, 2022 - NEET MCQ

The increase in the width of the depletion region is due to the absence of the electrons and holes in the region. This occurs only in the case of the reverse bias only in a diode.
Hence, the correct option is (A).

The boiling point of a given compound is as follows:
I. Ethylmethylamine - 33 to 34 °C
II. Propylamine - 49 °C
III. Trimethylamine - 2.9 °C

Hence, the correct option is (B).

The period from birth to natural death of an organism is known as its life span. It varies from few years to thousand years, depending on the organism.

Glass, paper, and cotton are good quality insulators. The rest options contain one or more conducting materials. Silver is the best conductor material available in nature. But it is costly, so it can’t be used in the electricity distribution system.

Beryllium, differs from the rest of the members of its group due to the following reasons: beryllium has a small atomic and ionic size, it has no vacant d-orbitals and it has a higher charge density comparatively.

When aluminium reacts with alkali, that is when one mole of aluminium reacts with two moles of sodium hydroxide in presence of two moles of water two moles of sodium meta aluminate is formed along with three moles of hydrogen. The chemical formula for sodium meta aluminate is Na₂Al₂O₄.

The molecules in the insoluble fraction except for lipids are polymeric substances, which means that proteins, nucleic acids and polysaccharides exists as polymeric substances.

Proteins are polypeptides. They are linear chains of amino acids linked by peptide bonds. Each protein is a heteropolymer of amino acids.

Starch is present as a storehouse of energy in the plant tissues. Starch forms helical secondary structures which can hold iodine molecules in the helical portions. Therefore, the starch-iodine is blue.

NACO through its 1200 nationwide sentinel surveillance sites believe that the number of HIV infected patients in India was 2.4 million at the end of 2009, out of the total 33 million present to be worldwide. 63% of the HIV infected individuals lived in Andhra Pradesh, Tamil Nadu, Karnataka and Maharashtra.