Assertion and reasoning questions:
In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
Assertion: Viviparous animals give better protection to their off springs.
Reason: They lay their eggs in the safe places of the environment.
Codes:
A. If both A and R are true and R is correct explanation for A
B. If both A and R are true but R is not the correct explanation for A
C. If A is true but R is false
D. If both A and R are false.

(a)

If both A and R are true and R is correct explanation for A

(b)

If both A and R are true but R is not the correct explanation for A

(c)

If A is true but R is false

(d)

If both A and R are false

Budding is seen in ______

(a)

Noctiluca

(b)

Amoeba

(c)

Nostoc

(d)

Planaria

A few statements with regard to sexual reproduction are given below:
i. Sexual reproduction does not always require two individuals
ii. Sexual reproduction generally involves gametic fusion
iii. Meiosis never occurs during sexual reproduction
iv. External fertilization is a rule during sexual reproduction
Choose the correct statements from the options below:

(a)

i and iv

(b)

i and ii

(c)

ii and iii

(d)

i and iv

The male sex hormone testosterone is secreted from _____.

(a)

Sertoli cells

(b)

Leydig cell

(c)

Epididymis

(d)

Prostate gland

Assertion(A): Ovulation is the release of ovum from the Graafian follicle.
Reason(R): It occurs during the follicular phase of the menstrual cycle.
Codes:
(a) A and R are true, R is the correct explanation of A
(b) A and R are true, R is not the correct explanation of A
(c)  A is true, R is false
(d) Both A and R are false

(a)

A and R are true, R is the correct explanation of A

(b)

A and R are true, R is not the correct explanation of A

(c)

A is true, R is false

(d)

Both A and R are false

ABO blood group in man is controlled by _____.

(a)

Multiple alleles

(b)

Lethal genes

(c)

Sex linked genes

(d)

Y-linked genes

Co-dominant blood group is ______.

(a)

A

(b)

AB

(c)

B

(d)

O

Meselson and Stahl’s experiment proved

(a)

Transduction

(b)

Transformation

(c)

DNA is the genetic material

(d)

Semi-conservative nature of DNA replication

Choose the correctly match pair.

(a)

Amphetamines - Stimulant

(b)

LSD - Narcotic

(c)

Heroin - Psychotropic

(d)

Benzodiazepine - Pain killer

Vaccines that use components of a pathogenic organism rather than the whole organism are called

(a)

Subunit recombinant vaccines

(b)

attenuated recombinant vaccines

(c)

DNA vaccines

(d)

conventional vaccines

Which among the following always decreases in a Food chain across tropic levels?

(a)

Number

(b)

Accumulated chemicals

(c)

Energy

(d)

Force

Transmitting tissue is found in ______.

(a)

Micropylar region of ovule

(b)

Pollen tube wall

(c)

Stylar region of gynoecium

(d)

Integument

Genetic engineering is _____.

(a)

making artificial genes.

(b)

hybridization of DNA of one organism to that of the others.

(c)

production of alcohol by using micro organisms.

(d)

making artificial limbs, diagnostic instruments such as ECG, EEG etc.,

Strong, sharp spines that get attached to animal’s feet are found in the fruits of ______.

(a)

Argemone

(b)

Ecballium

(c)

Heritier

(d)

Crossandra

Match Column I with Column II

Column I	Column II
i) William S. Gaud	I) Heterosis
ii) Shull	II) Mutation breeding
iii) Cotton Mather	III) Green revolution
iv) Muller and Stadler	IV) Natural hybridization

(a)

i	ii	iii	iv
I	II	III	IV

(b)

i	ii	iii	iv
III	I	IV	II

(c)

i	ii	iii	iv
IV	II	I	IV

(d)

i	ii	iii	iv
II	IV	III	I

What is zymology?

What is the significance of world biofuel day?

Name the two viruses that acts as biocontrol agents.

Name the various kinds of ELISA.

Define alpine zone

Define species extinction. What makes a species to become extinct?

Distinguish replication and transcription.

How 5' of DNA differ from its 3'?

Differentiate Sympatric speciation and Allopatric speciation.

What are coprolites? Mention its role in phylogeny.

Name the scientists who were awarded Nobel Prize in 1945 for discovering the penicillin drug & its role as an antibiotic.

Functional Insulin differs from its pre-hormonal form. How?

Explain how mutation can impact genetic code with an example

Write the characteristics of tundra.

Give the characteristic features of Anemophilous plants.

Explain the procedure of Southern Blotting Technique. Southern Blotting Techniques - DNA

Explain the stepwise preparation of Bio-pest repellent from the leaves of Azadirachta indica