Biology NTSE Stage-1

NTSE (STAGE-1) DAILY PRACTICE PROBLEMS

S E S S I O N -2 0 1 2 – 1 3

IIT-JEE | AIPMT | AIEEE | OLYMPIADS | KVPY | NTSE Subject : Biology 1.

2.

3.

Topic : Control & Co-ordination

DPP No.__ 01

Nissl’s body found in neuron are – (A) made up of DNA (C) helps in formation of neurofibrils

(B) made up of ribosomes & RER (D) mass of mitochondria

The cerebellum is concerned with – (A) co–ordination of muscular movements (C) memory

(B) perception (D) vision

Which cell organelle is absent in neuron (A) mitochondria (B) ribosomes

(C) centrioles

Class : X

(D) nucleus

4.

Two halves of the cerebellum are connected through (A) cerebral hemispheres (B) medulla oblongata (C) corpus callosum (D) pons varolii

5.

The study of nervous system and its disorders is called (A) neurogenesis (B) hematology (C) neuroglia

(D) neurology

Loss of memory can be done by destruction of (A) cerebrum (B) cerebellum

(D) diencephalon

6.

(C) medulla

7.

The hormone which darkens the skin of the frog is(A) Insulin (B) Oestrogen (C) Melanocyte Stimulating Hormone (D) None of these

8.

It has been observed that after-effects of low temperature treatment are helpful in promoting the flowering in certain plants. Through this the vegetative period of plants becomes short and early flowering takes place. This phenomenon is known as : (A) vernalization (B) florigenation (C) photoperiodism (D) heliotropism

9.

Term ‘Hormone’ was coined by (A) Karl landsteiner (B) Bayliss and starling

(C) Louis Pasteur

Hormones may be (A) steroids

(C) amino acid derivatives (D) all of the above

10. 11. 12. 13.

(B) peptides

(D) F.W. Went

Hormone Involved in inhibition of growth is (A) ABA (B) Auxin

(C) None of the above

(D) Both A and B

Which one of the following is plant hormone ? (A) ADH (B) ACTH

(C) IAA

(D) CAMP

The movement of organ in response to light is called (A) Hydrotropism (B) Thigmotropism (C) Phototropism

(D) Geotropism

14.

Gibberellic acid has been successfully employed to induce flowering (A) in long day plants under short day conditions (B) in short day plants under long day conditions (C) for some plants (D) none of the above

15.

In callus culture roots can be induced by the supply of (A) Auxin (B) Cytokinin (C) Gibberellin

16.

In reflex action the reflex arc is formed by (A) brain  spinal cord  muscles (C) muscle  receptor  brain

(D) Ethylene

(B) receptor  spinal cord  muscles (D) muscles  spinal cord  receptor

17.

Movement of pollen tube towards ovary through stigma & style is an example of (A) Geotropism (B) Phototropism (C) Chemotropism (D) thigmotropism

18.

Artificial ripening of fruits is carried out by (A) Auxin (B) Kinetic

(C) Ethylene

(D) ABA 1

NTSE (STAGE-1) DAILY PRACTICE PROBLEMS

S E S S I O N -2 0 1 2 – 1 3

IIT-JEE | AIPMT | AIEEE | OLYMPIADS | KVPY | NTSE Subject : Biology 1. 2.

3. 4.

5. 6.

7.

8.

9. 10. 11. 12. 13.

14.

Topic : Heredity and variations

DPP No.__ 02

Class : X

Hereditary variations in plants have been produced by use of – (A) Auxins (B) Gibberellic acid (C) X-Ray (D) DDT Alleles are (A) homologous chromosomes (B) chromosomes that have crossed over (C) alternate forms of gene (D) linked genes Back cross is a cross between (A) F1 × F1 (B) F1 × recessive (C) F1 × dominant (D) F1 × any parent Emasculation is achieved by (A) removal of stigma (B) removal of anthers (C) removal of sepal & petals (D) removal of gynoecium Genetic drift is effective only in populations which are – (A) Small (B) Large (C) Mendelian (D) Inhabitants of islands Basic idea of evolution is – (A) descent with modification (B) spontaneous generation (C) special creation (D) cosmic Evolution How many different types of gametes can be formed by F1 progeny, resulting from the cross AA BB CC × aa bb cc ? (A) 3 (B) 8 (C) 27 (D) 64 Genetics deals with (A) heredity and variations (B) heredity (C) mutations (D) nuclear and cytoplasmic inheritance Mendel did not postulate about (A) dominance (B) segregation (C) linkage (D) independent assortment If a cross between two plants give 50% tall and 50% dwarf progeny, then the parents genotypes are (A) Tt × Tt (B) Tt × tt (C) TT × tt (D) TT × Tt A cross between hybrid and a receive parent (t × tt) gives a ratio of (A) 1 : 1 (B) 2 : 1 (C) 3 : 1 (D) 1 : 2 : 1 The process of translation means (A) DNA synthesis (B) RNA synthesis (C) Protein synthesis (D) Ribosome assembly A genetically manipulated organism containing in it's genome one or more inserted genes of another species is called (A) transposom (B) gene expression (C) transgenic organism (D) retroposon Correct option for position 1 & 2 is – YR

yR

yr

Yr

Yr

YYRr

1

Yyrr

YYrr

YR

YYRR YyRR YyRr

+

15. 16.

2

(A) (1) YYRr, (2) YyRr (B) (1) YyRr, (2) YyRr (C) (1) YyRr, (2) YYRr (D) (1) YYRr, (2) YyRR Which are immortal ? (A) Germ cells (B) Somatic cells (C) Pituitary cells (D) Glomerular cells Tall red flowered pea plant crossed to dwarf white flowered plant yields only tall red flowered plants. A test cross shall give a ratio of (A) 1 : 1 (B) 3 : 1 (C) 1 : 1 : 1 : 1 (D) 1 : 2 : 4 : 6 : 4 : 2 : 1 2

NTSE (STAGE-1) DAILY PRACTICE PROBLEMS

S E S S I O N -2 0 1 2 – 1 3

IIT-JEE | AIPMT | AIEEE | OLYMPIADS | KVPY | NTSE Subject : Biology 1.

Topic : Nutrition and respiration,Transportation, Excretion DPP No.__ 03

Transpiration is helpful in (A) Cooling

2.

3.

(B) Loss of Water

(C) Ascent of sap

(D) Loss of nutrients

The plants die due to wilting when (A) Available light is reduced to half

(B) Xylem is blocked

(C) A few roots are broken

(D) Phloem is blocked

Loss of water from the tips of leaves is called (A) guttation

4.

Class : X

(B) transpiration

(C) respiration

(D) bleeding

In the cardiac cycle, diastole is (A) the number of heart beats per minute (B) the relaxation period after contraction of the heart (C) the forceful pumping action of the heart (D) the contraction period after relaxation of the heart

5.

6.

The first heart sound is produced when : (A) intraventricular pressure decreases

(B) semilunar valve snaps shut

(C) bicuspid and tricuspid valve close quickly

(D) diastole begins

Heparin is an (A) anticoagulant

7.

9.

10.

(B) lymph without corpuscles

(C) blood without corpuscles and fibrinogen

(D) lymph

A doctor suggest to a couple not to have more than one child because of (A) Rh+ male and Rh– female

(B) Rh– male and Rh+ female

(C) Rh+ male and Rh+ female

(D) Rh– male and Rh– female

HCl is secreted by

(D) Calf

(B) Internal ear

(C) Gastric glands

(D) Crypts of Lieberkuhn

(B) diencephalon

(C) spinal cord

(D) medulla oblongata

(B) reptiles

(C) mammals

(D) Amphibia

(B) carbonic acid

(C) succinic acid

(D) acetic acid

(C) larynx

(D) internal ear

Epiglottis guards the opening of (B) glottis

The intermediate between glycolysis and TCA cycle is (A) pyruvic acid

18.

(C) Rabbit

Most of the dissolved CO2 in blood reacts with water and form

(A) eustachian tube 17.

(B) Frog

Diaphragm is a characteristic feature of

(A) oxalic acid 16.

(D) None of these.

The respiratory centres, which control inspiration and expiration, are located in

(A) birds 15.

(C) Oxyntic cells

Argentaffin cells are found in :

(A) cerebellum 14.

(B) Peptic cells

Which one of the following does not digest milk with rennin ?

(A) Pancreas 13.

(D) antiseptic

(A) blood without fibrinogen

(A) Man 12.

(C) antiallergic

Serum is -

(A) Zymogen cells 11.

(B) blood diluter

(B) glucose

(C) oxaloacetate

(D) acetyl-Co-A

Glycolysis is the conversion of (A) glucose into glycogen

(B) glycogen into glucose

(C) glucose into citric acid

(D) glucose into pyruvic acid

3

NTSE (STAGE-1) DAILY PRACTICE PROBLEMS IIT-JEE | AIPMT | AIEEE | OLYMPIADS | KVPY | NTSE Subject : Biology 1.

2. 3.

4.

5. 6.

7.

8.

9.

10.

11. 12. 12. 13. 14. 15.

16. 17. 18.

19.

Topic : Cell and tissue

S E S S I O N -2 0 1 2 – 1 3 DPP No.__ 04

Class : X

Inter phase (A) is same as Prophase, Metaphase (B) includes Stages G, S & G2 (C) requires the use of polar fibres (D) rarely occurs In which phase of mitosis, chromosomes move towards poles (A) Prophase (B) Metaphase (C) Anaphase (D) Telophase DNA Replication is (A) Continous and conservative (B) Discontinous (C) Semidiscontinous and Semi conservative (D) Conservative and semidiscontinous The first cytologically visible evidence of the fact that a cell is about to divide is (A) division of its centriole (B) duplication of chromosomes (C) elongation of chromosomes (D) coiling of chromosome Exchange of segments between homologous chromosomes is called (A) Synaps (B) Synapse (C) Crossing-over (D) Terminalization Which of the following statements about histones is not true ? (A) Histones are very similar between species (B) Histones have many basic amino acids (C) Histones are rich in lysine and arginine (D) Each histone has one single gene that codes for it What do telomeres do ? (A) They protect chromosomes from degradation by nucleases (B) They prevent ends of chromosomes from fusing with other (C) They are required for complete chromosomal replication (D) All are correct The cytoplasmic connections from cell to cell are known as (A) middle Lamella (B) plasmodesmata (C) cell membrane system (D) endoplasmic reticulum Protoplasm is the seat for all (A) anabolic functions (B) catabolic functions (C) metabolic functions (D) physiological functions Presence of DNA in chloroplasts and mitochondria indicates that (A) glycolysis occurs in them (B) they originated as independent free living organisms (C) they undergo meiosis and mitosis Independent of nucleus (D) they take part in ATP synthesis Intercalary meristem is derived from (A) Apical meristem (B) Lateral meristem (C) Both of the above (D) None of the above Specialised parenchyma occurring in aquatic plants is (A) Prosenchyma (B) Chlorenchyma (C) Aerenchyma (D) None of the above The meristematic cells have (A) thin walls (B) Active nucleus (C) absence of vacuoles (D) all of the above Intercalary meristem is located in (A) petiole and internode(B) stem tip (C) root (D) bud Cell wall of sclerenchyma is (A) permeable (B) semi-permeable (C) impermeable (D) none of above Which cellular activity takes place in the mitochondria ? (A) Oxidative phosphorylation (B) Photophosphorylation (C) Kreb cycle (D) (A) & (C) both The folds of plasma membrane in bacterial cells are known as (A) episomes (B) mesosomes (C) spherosomes (D) acrosomes Cells with secretory function have abundant (A) dictyosomes (B) ER (C) lysosomes (D) osteosomes Cilia are : (A) numerous elongated thread like structures (B) 1 or 2 elongated thread like structures (C) numerous minute hair like structures (D) 1 or 2 minute hair like structures 4 The most suitable microscope to study organelles in a living cell is:(A) Magnifying lens (B) Stereoscopic microscope (C) Phase contrast microscope (D) Electron microscope

BIOLOGY _NTSE STAGE-1 CLASS-X Control & Co-ordination Q. A,

1 B

2 A

3 C

4 C

5 D

DPP - 01 6 A

7 C

8 A

9 B

10 11 12 13 14 15 16 17 18 D A C C A A B C C

Heredity and Variations Q. A,

1 C

2 C

3 D

4 B

5 A

DPP - 02 6 A

7 B

8 A

9 C

10 11 12 13 14 15 16 B A C C C A C

Nutrition and respiration,Transportation, Excretion Q. A,

1 C

2 B

3 A

4 B

5 C

6 A

7 C

8 A

9 C

1 B

2 C

3 C

10 11 12 13 14 15 16 17 18 C B C D C B B D D

DPP - 04

Cell and tissue

Q. A.

DPP - 03

4 A

5 C

6 D

7 D

8 B

9 C

10 11 12 12 13 14 15 16 17 18 19 B A C D A C D B A C C