NEET 2021

Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as :

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During muscular contraction which of the following events occur?(1) 'H' zone disappears(2) 'A' band widens(3) 'I' band reduces in width(4) Myosine hydrolyzes ATP, releasing the ADP and Pi.(5) Z-lines attached to actins are pulled inwards.Ch...

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DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as

Complete the flow chart on central dogma.

What is the role of RNA polymerase III in the process of transcription in eukaryotes?

DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as

Identify the correct statement.

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

Which of the following RNAs is not required for the synthesis of protein?

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

Which one of the following statements about histones is wrong?

Statement I : The codon 'AUG' codes for methionine and phenylalanine.Statement II : 'AAA' and 'AAG' both codons code for the amino acid lysine.In the light of the above statements, choose the correct answer from the options given below.

Match Column-I with Column-II Select the correct answer from the options given below.

Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

Amensalism can be represented as :

In the exponential growth equation Nt = N0ert, e represents

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The first stable product of CO2 fixation in Sorghum is

Which of the following statements is incorrect?

Plants follow different pathways in response to environment of phases of life to form different kinds of structures. This ability is called

The site of perception of light in plants during photoperiodism is

The plant hormone used to destroy weeds in a field

Gemmae are present in

Which of the following algae produce Carrageen?

Which of the following algae contains mannitol as reverse food material?

The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called :

Now-a-days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because:

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

Genera like Selaginella and Salvinia produce to kinds of spores. Such plants are known as :

Which of the following plants is monoecious?

Which one of the following is an example of Hormone releasing IUD?

Veneral diseases can spread through :(1) Using sterile needles(2) Transfusion of blood from infected person(3) Infector mother to foetus(4) Kissing(5) InheritanceChoose the correct answer from the option given below.

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Which of the following statements is incorrect?

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :

Diadelphous stamens are found in

A typical angiosperm embryo sac at maturity is :

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

Mutations in plant cells can be induced by :

Which of the following is not an objective of Biofortification of crops?

Which of the following is not a step in Multiple Ovulation Embryo Transfer Technology (MOET)?

Which of the following statements wrongly represents the nature of smooth muscle?

Which of the following characteristics is incorrect with respect to cockroach?

Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.

Following are the statements about prostomium of earthworm.(1) It serves as a covering for mouth.(2) It helps to open cracks in the soil into which it can crawl.(3) It is one of the sensory structures.(4) It is the first body segment.Choose...

Which one of the following belongs to the family Muscidae?

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