Daily NEET MCQ- February 28, 2022 - NEET MCQ

Annual rings are not prominent in trees of temperate region is not true about formation of Annual Rings in trees.

Growth rings are formed by the seasonal activity of cambium. In plants of temperate regions, cambium is more active in spring and less active in autumn seasons. In temperate regions climatic conditions are not uniform throughout the year. However in tropics climatic conditions are uniform throughout the year.

Hence, the correct option is (D).

The amount of biodegradable organic matter in sewage water can be estimated by measuring-

(1) Biochemical oxygen demand (2) The growth of anaerobic bacteria in water (3) Biogeological oxygen demand (4) The growth of aerobic bacteria in water

Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature.

Hence, the correct option is (C).

ATP is consumed during the "Glucose to Glucose 6 Phosphate" reaction.

In cell glucose 6-phosphate is formed from glucose by phosphorylation and it is catalyzed by the enzyme hexokinase. In this reaction, one equivalent of ATP is consumed in glycolysis. 

Glucose-6-phosphate is utilized for the synthesis and storage of glycogen. Its metabolism is enhanced to pyruvate. The glycolytic pathway is due to the action of regulatory enzymes.

Hence, the correct option is (B).

The portion of a refracting medium, whose curved surface forms the part of a sphere, is known as a spherical refracting surface. Spherical refracting surfaces are of two types, namely, convex refracting spherical surface and concave refracting spherical surface.

Alcohols are compounds having OH group attached to an alkyl group and are hence hydroxy derivatives of hydrocarbons.

The photocurrent increases linearly with the intensity of the light but is independent of its frequency.

The stopping potential increases linearly with the frequency of the incident light but is independent of its intensity.

Hence, the correct option is (A).

Plants like Selaginella and Salvinia produce two kinds of spore i.e., microspores and macrospores. They are known as heterosporous. 

Most of the pteridophytes produce single type of spores and are called homosporous.

Sorus are brownish or yellowish cluster of sporeproducing structures located on the lower surface of fern leaves.

Hence, the correct option is (A).

Alcohols may be classified as mono-, di- tri- or polyhydric depending on whether it has one, two, three or more OH groups in its structure. Di- and trihydric alcohols are also classified as polyhydric.

Gradient pressure theory was provided by Munch. According to this theory a gradient of osmotic pressure and hence turgor pressure is established within the sieve tube as a result of entry of photosynthates from the leaf mesophyll, and their removal for consumption in areas of growth and storage.
Hence, the correct option is (C).

Allylic alcohols are those in which OH group is attached to a sp³ hybridised carbon adjacent to a C-C double bond, i.e., an allylic carbon. Whereas, vinylic alcohols contain OH group attached directly to a C-C double bond.