Biological Classification — Page 7 | NEET Biology

Q61

Tobacco Mosaic Virus (TMV) genes are

A double stranded RNA

B single stranded RNA

C polyribonucleotides

D proteinaceous

Correct Answer

Option B

Solution

(b) TMV contains single stranded RNA as its genetic material.

Q62

Five kingdom system of classification suggested by R.H. Whittaker is not based on:

A Presence or absence of a well defined nucleus.

B Mode of reproduction.

C Mode of nutrition.

D Complexity of body organisation.

Correct Answer

Option A

Solution

(a) Whittaker's five kingdom classification is based on complexity of cell structure, complexity of body, mode of nutrition and phylogenetic relationships.

Q63

Mad cow disease in cattle is caused by an organism which has:

A Free DNA without protein coat

B Inert crystalline structure

C Abnormally folded protein

D Free RNA without protein coat

Correct Answer

Option C

Solution

(c) Prions are disease causing agents having abnormally folded proteins causing mad cow disease.

Q64

The infective stage of malarial parasite Plasmodium that enters human body is

A merozoite

B sporozoite

C trophozoite

D minuta form

Correct Answer

Option B

Solution

(b) The infective stage of Plasmodium that enters human blood is sporozoite.

Q65

Virus envelope is known as:

A Capsid

B Virion

C Nucleoprotein

D Core

Correct Answer

Option A

Solution

(a) Virus envelope is known as capsid composed of protein subunits called capsomers.

Q66

Which of the following shows coiled RNA strand and capsomeres?

A Polio virus

B Tobacco mosaic virus

C Measles virus

D Retrovirus

Correct Answer

Option B

Solution

(b) TMV has a core of helically coiled single stranded RNA with a protective capsid of capsomeres.

Q67

Genetic information in Paramecium is contained in

A micronucleus

B macronucleus

C both micronucleus and macronucleus

D mitochondria

Correct Answer

Option A

Solution

(a) Genetic information in Paramecium is contained in the micronucleus.

Q68

Trypanosoma belongs to class

A Sarcodina

B Zooflagellata

C Ciliata

D Sporozoa

Correct Answer

Option B

Solution

(b) Trypanosoma belongs to Zooflagellata of Protozoan Protista.

Q69

Which of the following is correct about viruses?

A Viruses lack a protein coat

B Viruses are obligate parasites.

C Infective constituent in viruses is the protein coat.

D Prions consist of abnormally folded proteins.

Correct Answer

Option B

Solution

(b) Viruses are obligate intracellular parasites. Prions consist of abnormally folded proteins.

Q70

Macro and micronucleus are the characteristic feature of

A Paramecium and Vorticella

B Opelina and Nictothisus

C Hydra and Ballantidium

D Vorticella and Nictothirus

Correct Answer

Option A

Solution

(a) Macronucleus and micronucleus are found in Paramecium and Vorticella.