Question Set C

CBSE 12th Standard Biology Biotechnology and its Applications HOT Questions Study Material - QB365

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Questions:

Multiple Choice Question

57 x 1 = 57

In the absence of acrosome, the sperm

(a)

Cannot get food

(b)

cannot swin

(c)

cannot penetrate the egg

(d)

cannot get energy

Restriction endonucleases are enzymes which

(a)

Remove nucleotides from ends of DNA molecule

(b)

make cuts at specific positions within the DNA molecule

(c)

recognise a specific nucleotide sequence for binding of DNA ligase

(d)

restrict the action of enzyme DNA polymerase

A nucleoside differs from a nucleotide in not having

(a)

sugar

(b)

glucose

(c)

Nitrogen base

(d)

Phosphate group

The major source of noise pollution world wide is due to:

(a)

office equipment

(b)

transport system

(c)

sugar, textile and paper industries

(d)

oil refineries and thermal power plants.

Hormone responsible for the secretion of milk after parturition is

(a)

ICSH

(b)

Prolactin

(c)

ACTH

(d)

Which of the following is not a concept of Lamarck?

(a)

environmental pressure causes variation

(b)

rate and survival of organism is different due to variation

(c)

inheritance of acquired character

(d)

if an organ is used constantly it will continuously increase in size

An inexhaustible nonconventional universal source of energy is

(a)

wind energy

(b)

solar energy

(c)

hydrothermal energy

(d)

tidal energy

Which one of the following statements is correct?

(a)

there is no evidence of existence of gills during embryogenesis of mammals

(b)

all plant and animal cells are totipotent

(c)

ontogeny repeats phylogeny

(d)

stem cells are specialized cells

Frog's testes do not possess

(a)

Interstitial cells

(b)

Seminiferous tubules

(c)

Sertoli cells

(d)

Seminal vesicles

10.

Total number of identified biodiversity hotspots in the world is

(a)

(b)

(c)

(d)

11.

An important evidence in favour of organic evolution is the occurrence of

(a)

homologous and analogous organs

(b)

homologous and vestigial organs

(c)

analogous and vestigial organs

(d)

homologous organs only

12.

Age of fossils in the past was generally determined by radiocarbon method and other methods involving radioactive elements found in the rocks.More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms,includes

(a)

study of the conditions of fossilization

(b)

electron spin resonance(ESR) and fossil DNA

(c)

study of carbohydrates/proteins in rocks

(d)

study of carbohydrates/proteins in fossils

13.

'Athlete's foot' is caused by

(a)

Tinea pedis

(b)

Tinea capitis

(c)

Candida albicans

(d)

Rickettsia

14.

Which one of the following statements is correct for secondary succession?

(a)

it begins on a bare rock

(b)

it occur on a deforested site

(c)

it follows primary succession

(d)

it is similar to primary succession except that it has a relatively fast pace

15.

DNA is a polymer of nucleotides which are linked to each other by 3'-5' phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose?

(a)

(a) Replace purine with pyrimidines

(b)

(b) Remove/Replace 3' OH group in deoxyribose

(c)

(d)

(d) Both 'b' and 'c'

16.

In ecological succession, the climax community is best recognised by the following state

(a)

P = R

(b)

P > R

(c)

P < R

(d)

\(P\neq R\)

17.

Term ecosystem was given by

(a)

Odum

(b)

Haeckel

(c)

Tansley

(d)

Mobius and Forbes

18.

India became a party to 'Convention on Biological Diversity'in the year

(a)

1994

(b)

1993

(c)

1992

(d)

1998

19.

These belong to the category of primary consumers

(a)

Insects and cattle

(b)

Eagle and snakes

(c)

Water insects

(d)

Snakes and frogs

20.

Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

(a)

1985

(b)

1986

(c)

1987

(d)

1988

21.

Biosphere reserves differ from national parks and wildlife sanctuaries because in the former

(a)

human beings are not allowed to enter

(b)

people are an integral part of the system

(c)

Plants are paid greater attention than the animals

(d)

living and preserved for posterity

22.

Example of corm is

(a)

Ginger

(b)

Colocasia

(c)

Onion

(d)

potato

23.

What parameters are used for tiger census in our country's national parks sanctuaries?

(a)

Pug marks only

(b)

Pug marks and faecal pellets

(c)

Faecal pellets only

(d)

Actual head counts

24.

Nucellar polyembryony is reported in species of

(a)

Citrus

(b)

Gossypium

(c)

Triticum

(d)

Brassica

25.

Which of the following wall layers of anther plays a predominant role in its dehiscence?

(a)

Epidermis

(b)

Endothecium

(c)

Middle layers

(d)

Tapetum

26.

Transverse binary fission occurs in

(a)

Euglena

(b)

Amoeba

(c)

Hydra

(d)

Paramecium

27.

Blood group agglutinogen is

(a)

Glycoprotein

(b)

Phosphoprotein

(c)

Haemoprotein

(d)

Phospholipid

28.

A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His friend who was valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

(a)

Type B

(b)

Type AB

(c)

Type O

(d)

Type A

29.

Aedes mosquito is a vector of

(a)

Malaria

(b)

Filariasis

(c)

Cholera

(d)

Dengue

30.

Humus is present in

(a)

horizon-A

(b)

horizon-O

(c)

horizon-B

(d)

horizon-C

31.

A pea plant parent having violet colour flowers with unknown genotype was crossed with a plant having white colour flowers, in the progeny 50% flowers were violet and 50% were white. The genotypic constitution of the parent having violet colour flower was

(a)

Homozygous

(b)

Merozygous

(c)

Heterozygous

(d)

Hemizygous

32.

The figure below shows three steps (A, B, C) of polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents?

(a)

B-denaturation at a temperature of about 98\(^{o}\)C separating the two DNA strands

(b)

A-denaturation at a temperature of about 50\(^{o}\)C

(c)

C-extension in the presence of heat stable DNA polymerase

(d)

A-annealing with two sets of primers

33.

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

(a)

the female parent is heterozygous

(b)

the parents could not have had a normal daughter of this character

(c)

the trait under study can not be color blindness.

(d)

the male parent is homozygous dominant.

34.

Read the following four statements (A-D) about certain mistakes in two of them:
(A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched
(B) Restriction enzymes are used in isolation of DNA from other macromolecules
(C) Downstream processing is one of the steps of rDNA technology
(D) Disarmed pathogen vectors are also used in transfer of rDNA into the host
Which of the two statements have mistakes?

(a)

B and C

(b)

C and D

(c)

A and C

(d)

A and B

35.

If the person shows the production of interferons in his body, chances are that he suffering from

(a)

Measles

(b)

Tetanus

(c)

Anthrax

(d)

Malaria

36.

The outermost and innermost wall layers of microsporangium in an anther are respectively

(a)

Endothecium and tapetum

(b)

Epidermis and endodermis

(c)

Epidermis and middle layers

(d)

Epidermis and tapetum

37.

In RNAi, genes are silenced using:

(a)

aa DNA

(b)

ds DNA

(c)

ds RNA

(d)

ss RNA

38.

The ability of the venus fly trap to capture insects is due to

(a)

specialized 'muscle-like' cells

(b)

chemical stimulation by the prey

(c)

a passive process requiring no special ability on the part of the plant

(d)

rapid turgor pressure changes

39.

Mother and father of a person with 'O' blood group have "A" and 'B' blood group respectively. What would be the genotype of both mother and father?

(a)

Mother is homozygous for "A" blood group and father is heterozygous for 'B'

(b)

Mother is heterozygous for 'A' blood group and father is homozygous for 'B'

(c)

Both mother and father are heterozygous for 'A' and 'B' blood group, respectively

(d)

Both mother and father are homozygous for "A" and 'B' blood group, respectively

40.

Rotenone is a

(a)

bioherbicide

(b)

commonly used biofertilizer

(c)

bioinsecticide

(d)

juvenile hormone

41.

Genetically engineered bacteria are being employed for production of

(a)

Thyroxine

(b)

Human insulin

(c)

Cortisol

(d)

Epinephrine

42.

Biogas production is carried out by

(a)

thermoacidophils

(b)

methanogens

(c)

halophiles

(d)

luminants

43.

The agriculture sector of India employs

(a)

60% of the population

(b)

70% of the population

(c)

30% of the population

(d)

62% of the population

44.

When domestic sewage mixes with-------

(a)

Small animals like rats will die after drinking river water.

(b)

The increased microbial activity releases micronutrients such as iron.

(c)

The increased microbial activity uses up dissolved oxygen.

(d)

The river water is still suitable for drinking as impurities are only about 0.1%

45.

It is a disease which mainly affects mucous membrane of urinogenital tract. In males, burning feeling on passing urine, after a yellow discharge occurs, that is accompanied by fever, headache and feeling of illness.

(a)

Syphilis

(b)

Gonorrhoea

(c)

Genital warts

(d)

Trichomoniasis

46.

Plants of which one of the following groups of genera are pollinated by the same agency?

(a)

Triticum, Cocos, Mangifera

(b)

Ficus, Kigelia, Casuarina

(c)

Salvia, Morus, Euphorbia

(d)

Bombax, Butea, Bauhinia

47.

Gel electrophoresis is used for

(a)

Construction of recombinant DNA by joining with cloning vectors

(b)

Isolation of DNA molecules

(c)

Cutting of DNA into fragments

(d)

Separation of DNA fragments according to their size

48.

Medical Termination of Pregnancy (MTP) is considered safe up to how many weeks of pregnancy?

(a)

8 weeks

(b)

12 weeks

(c)

18 weeks

(d)

6 weeks

49.

In transgenics, expression of transgene in target tissue is determind by

(a)

Transgene

(b)

Promoter

(c)

Reporter

(d)

Enhancer

50.

One of the key factors, which makes the plasmid the vector in genetic engineering is that

(a)

It is resistant to antibiotics.

(b)

It is resistant to restriction enzymes.

(c)

Its ability to carry a foreign gene.

(d)

Its ability to cause infection in the host.

51.

Hargobind Khorana got Nobel Prize for

(a)

Gene synthesis

(b)

Determining genetic code

(c)

Producing disease resistant maize

(d)

Discovery of transposons

52.

Saccharomyces cerevisiae is used for production of

(a)

Bread

(b)

Ethanol

(c)

Both (a) and (b)

(d)

Acetic acid

53.

Which of the following birth control measures can be considered as the safest?

(a)

the rhythm method

(b)

the use of physical barriers

(c)

termination of unwanted pregnancy

(d)

sterilization techniques

54.

Monosomy and trisomy can be represented as

(a)

2n+1,2n+3

(b)

2n-1.2n-2

(c)

2n,2n+1

(d)

2n-1,2n+1

55.

Dharwar American Variety of cotton is the product of

(a)

Mass selection

(b)

Mutual breeding

(c)

Clonal selection

(d)

Parasexual hybridization

56.

Which one of the following substance is responsible for callus formation

(a)

2,4-D

(b)

NAA

(c)

BAP

(d)

PEG

57.

Which of the following statements true of date plam?

(a)

It is monoecious producing both staminate flowers and pistilate flowers in the same plant.

(b)

It is monoecious producing staminate flowers in one tree and pistillate flowers in another tree.

(c)

It is dioecious producing staminate flowers in one tree and pistillate flowers in another tree.

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Answers Key:

Multiple Choice Question

57 x 1 = 57

(b)
make cuts at specific positions within the DNA molecule

(d)
Phosphate group

(b)
transport system

(b)
Prolactin

(b)
rate and survival of organism is different due to variation

(b)
solar energy

10.

(d)
34

11.

(b)
homologous and vestigial organs

12.

(b)
electron spin resonance(ESR) and fossil DNA

13.

(a)
Tinea pedis

14.

(b)
it occur on a deforested site

15.

(b)
(b) Remove/Replace 3' OH group in deoxyribose

16.

(a)
P = R

17.

18.

(a)
1994

19.

(a)
Insects and cattle

20.

21.

(b)
people are an integral part of the system

22.

(b)
Colocasia

23.

(b)
Pug marks and faecal pellets

24.

(a)
Citrus

25.

(b)
Endothecium

26.

(d)
Paramecium

27.

(a)
Glycoprotein

28.

29.

(d)
Dengue

30.

(b)
horizon-O

31.

32.

(a)
B-denaturation at a temperature of about 98\(^{o}\)C separating the two DNA strands

33.

(a)
the female parent is heterozygous

34.

(d)
A and B

35.

(a)
Measles

36.

(a)
Endothecium and tapetum

37.

38.

(d)
rapid turgor pressure changes

39.

40.

41.

(b)
Human insulin

42.

(b)
methanogens

43.

(d)
62% of the population

44.

45.

(b)
Gonorrhoea

46.

(d)
Bombax, Butea, Bauhinia

47.

(d)
Separation of DNA fragments according to their size

48.

(b)
12 weeks

49.

(b)
Promoter

50.

51.

(a)
Gene synthesis

52.

(a)
Bread

53.

(d)
sterilization techniques

54.

(d)
2n-1,2n+1

55.

(a)
Mass selection

56.

(a)
2,4-D

57.

CBSE 12th Standard Biology Biotechnology and its Applications HOT Questions Study Material - QB365 Set C

QB365 Student Learing Managemnet System

Std: 12th Standard CBSE - Biology

chapter: Biotechnology and its Applications - HOT Questions

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Questions:

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