Animals giving birth to young ones:

(a)

Oviparous

(b)

Oviviviparous

(c)

Viviparous

(d)

Both a and b

The male sex hormone testosterone is secreted from _____.

(a)

Sertoli cells

(b)

Leydig cell

(c)

Epididymis

(d)

Prostate gland

The process which the sperm undergoes before penetrating the ovum is _____.

(a)

Spermiation

(b)

Cortical reaction

(c)

Spermiogenesis

(d)

Capacitation

Assertion(A): In human male, testes are extra abdominal and lie in scrotal sacs.
Reason(R): Scrotum acts as thermoregulator and keeps temperature lower by 2^oC for normal sperm production.
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

Identify the correct statements from the following.

(a)

Chlamydiasis is a viral disease

(b)

Gonorrhoea is caused by a spirochaete bacterium, Treponema palladium

(c)

The incubation period for syphilis is 2 to 14 days in males and 7 to 21 days in females

(d)

Both syphilis and gonorrhoea are easily cured with antibiotics

Read the given statements and select the correct option.
Statement 1: Diaphragms, cervical caps and vaults are made of rubber and are inserted into the female reproductive tract to cover the cervix before coitus.
Statement 2: They are chemical barriers of conception and are reusable.

(a)

Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

(b)

Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.

(c)

Statement 1 is correct but statement 2 is incorrect

(d)

Both statements 1 and 2 are incorrect

ABO blood group in man is controlled by _____.

(a)

Multiple alleles

(b)

Lethal genes

(c)

Sex linked genes

(d)

Y-linked genes

Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is _____.

(a)

25%

(b)

50%

(c)

100%

(d)

75%

DNA and RNA are similar with respect to _____.

(a)

Thymine as a nitrogen base

(b)

A single-stranded helix shape

(c)

Nucleotide containing sugars, nitrogen bases and phosphates

(d)

The same sequence of nucleotides for the amino acid phenyl alanine

Meselson and Stahl’s experiment proved

(a)

Transduction

(b)

Transformation

(c)

DNA is the genetic material

(d)

Semi-conservative nature of DNA replication

Which of the following was the contribution of Hugo de Vries?

(a)

Theory of mutation

(b)

Theory of natural Selection

(c)

Theory of inheritance of acquired characters

(d)

Germplasm theory

Exo-erythrocytic schizogony of Plasmodium takes place in _______

(a)

RBC

(b)

Leucocytes

(c)

Stomach

(d)

Liver

Which of the following is not involved in nitrogen fixation?

(a)

Pseudomonas

(b)

Azotobacter

(c)

Anabaena

(d)

Nostac

How many amino acids are arranged in the two chains of Insulin

(a)

Chain A has 12 and Chain B has 13

(b)

Chain A has 21 and Chain B has 30 amino acids

(c)

Chain A has 20 and Chain B has 30 amino acids

(d)

Chain A has 12 and chain B has 20 amino acids.

Which of the following is an r-species

(a)

Human

(b)

Insects

(c)

Rhinoceros

(d)

Whale

Which of the following is considered a hotspots of biodiversity in India?

(a)

Western ghats

(b)

Indo-gangetic plain

(c)

Eastern Himalayas

(d)

Both (a) and (c)

With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?

(a)

Sustainable development

(b)

Combating the consequences of population

(c)

Mitigation norms of Green House Gases (GHGs) emission

(d)

Technology transfer mechanism to developing countries for ‘clean-energy’ production

In the E- waste generated by the Mobile Phones, which among the following metal is most abundant?

(a)

Copper

(b)

Silver

(c)

Palladium

(d)

Gold

Identify the correctly matched pair.

(a)

Tuber - Allium cepa

(b)

Sucker - Pistia

(c)

Rhizome - Musa

(d)

Stolon - Zingiber

In majority of plants pollen is liberated at _____.

(a)

1 celled stage

(b)

2 celled stage

(c)

3 celled stage

(d)

4 celled stage

Which one of the following is an example of polygenic inheritance?

(a)

Flower colour in Mirabilis Jalapa

(b)

Production of male honey bee

(c)

Pod shape in garden pea

(d)

Skin Colour in humans

In a test cross involving F₁ dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates ______.

(a)

The two genes are located on two different chromosomes

(b)

Chromosomes failed to separate during meiosis

(c)

The two genes are linked and present on the some chromosome

(d)

Both of the characters are controlled by more than one gene

The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

(a)

25 AB, 25 ab, 25 Ab, 25 aB

(b)

10 AB, 10 ab

(c)

45 AB, 45 ab

(d)

45 AB, 45 ab, 5 Ab, 5aB

Assertion (A): Gamma rays are generally use to induce mutation in wheat varieties.
Reason (R): Because they carry lower energy to non-ionize electrons from atom

(a)

A and R are correct

(b)

A is correct. R is wrong

(c)

A is wrong. R is correct

(d)

A and R are wrong

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.,

Micro propagation involves _____.

(a)

vegetative multiplication of plants by using micro-organisms.

(b)

vegetative multiplication of plants by using small explants.

(c)

vegetative multiplication of plants by using microspores.

(d)

Non-vegetative multiplication of plants by using microspores and megaspores.

Ecology is the study of an individual species is called
i) Community ecology
ii) Autecology
iii) Species ecology
iv) Synecology

(a)

 i only

(b)

ii only 

(c)

 i and iv only

(d)

ii and iii only

Which of the following is not a abiotic component of the ecosystem?

(a)

Bacteria

(b)

Humus

(c)

Organic compounds

(d)

Inorganic compounds

Find the wrongly matched pair.

(a)

Endemism - Species confined to a region and not found anywhere else.

(b)

Hotspots - Western ghats

(c)

Ex-situ Conservation - Zoological parks

(d)

Sacred groves - Saintri hills of Rajasthan

(e)

Alien sp. Of India - Water hyacinth

Pick out the odd pair

(a)

Mass selection - Morphological characters

(b)

Purline selection - Repeated self pollination

(c)

Clonal selection - Sexually propagated

(d)

Natural selection - Involves nature

Consider the following statements and choose the right option.
i) Cereals are members of grass family.
ii) Most of the food grains come from monocotyledon.

(a)

(i) is correct and (ii) is wrong

(b)

Both (i) and (ii) are correct

(c)

(i) is wrong and (ii) is correct

(d)

Both (i) and (ii) are wrong

Raja is injured and got swelling. The swelling is due to the infection of tissue is an example of

(a)

Mechanical barrier

(b)

Physiological barrier

(c)

Phagocytosis

(d)

Inflammation