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NEET BiologyGeneralEasy

Question

Which of the following is correct about viroids?

A

They have RNA with protein coat

B

They have free RNA without protein coat

C

They have DNA with protein coat

D

They have free DNA without protein coat

Step-by-Step Solution

Viroids are infectious agents that consist only of a short strand of circular, single-stranded RNA without a protein coat.

Exam Context & Concepts Covered

This question aligns with the NEET Biology syllabus, specifically targeting concepts from General. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

Biologyfollowingcorrectviroids

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How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

A.(1) 4
B.(2) 2
C.(3) 14
D.(4) 8
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Match the following columns and select the correct option. Column-I (a) Pituitary gland (b) Thyroid gland (c) Adrenal gland (d) Pancreas Column-II (i) Grave's disease (ii) Diabetes mellitus (iii) Diabetes insipidus (iv) Addison's disease

A.(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
B.(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
C.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D.(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
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Identify the wrong statement with reference to immunity.

1.When exposed to antigen (living or dead) antibodies are produced in the host's body. It is called "Active immunity".
2.When ready-made antibodies are directly given, it is called "Passive immunity".
3.Active immunity is quick and gives full response.
4.Foetus receives some antibodies from mother, it is an example for passive immunity.
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Flippers of Penguins and Dolphins are examples of

A.Adaptive radiation
B.Convergent evolution
C.Industrial melanism
D.Natural selection
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Identify the wrong statement with regard to Restriction Enzymes.

1.Each restriction enzyme functions by inspecting the length of a DNA sequence.
2.They cut the strand of DNA at palindromic sites.
3.They are useful in genetic engineering.
4.Sticky ends can be joined by using DNA ligases.
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Match the following columns and select the correct option. Column-I: (a) Clostridium butylicum, (b) Trichoderma polysporum, (c) Monascus purpureus, (d) Aspergillus niger. Column-II: (i) Cyclosporin-A, (ii) Butyric Acid, (iii) Citric Acid, (iv) Blood cholesterol lowering agent.

1.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2.(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
3.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
4.(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Which of the following statements about inclusion bodies is incorrect?

1.They are not bound by any membrane
2.These are involved in ingestion of food particles
3.They lie free in the cytoplasm
4.These represent reserve material in cytoplasm
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According to Robert May, the global species diversity is about

1.1.5 million
2.20 million
3.50 million
4.7 million
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