Question 1

1. Alleles refers to ___

Accepted Answer

various forms of gene which occurs on the same locus on homologous chromosomes.

Answer

various forms of gene which occurs on the same locus analogous chromosomes.

Answer

various forms of DNA which occurs on the same locus on homologous chromosomes.

Answer

various forms of gene which occurs on the different locus on homologous chromosomes.

Question 2

2. Heterozygous chromosomes are _____

Accepted Answer

A pair of chromosomes carrying dissimilar alleles of a particular character.

Answer

A pair of chromosomes carrying dissimilar alleles of a contrasting character.

Answer

A pair of chromosomes carrying similar alleles of a particular character.

Answer

A single chromosome carrying dissimilar alleles of a particular character

Question 3

3. In which of the following condition ,the recessive gene expresses itself?

Accepted Answer

Homozygous condition

Answer

F2 generation

Answer

Heterozygous condition

Answer

Y - linked inheritance

Question 4

4. In a human female ,ovum consists of :

Accepted Answer

22 pairs of autosomes and one pair of X chromosome.

Answer

23 pairs of autosomes

Answer

22 pairs of autosomes and 1 pair of sex chromosomes

Answer

22 autosomes and 1 pair of X - chromosomes

Question 5

5. A mature sperm of human male contains :

Accepted Answer

either X or Y chromosome

Answer

Only X chromosome

Answer

Only Y chromosomes

Answer

Both X and Y chromosomes

Question 6

6. Which type of gene is only expressed if there are two genes of that type of gene are present?

Accepted Answer

Recessive

Answer

Dominant

Answer

Mutant

Answer

Co-dominant

Question 7

7. The technical term for the sudden inheritable change in the gene is :

Accepted Answer

Mutation

Answer

Allele

Answer

Autosome

Answer

Variation

Question 8

8. Identify the odd from the following term:

Accepted Answer

Chicken pox

Answer

Haemophilia

Answer

Colour blindness

Answer

Albinism

Question 9

9. Name the physical expression of gene in an individual.

Accepted Answer

phenotype

Answer

Genotype

Answer

Homozygous

Answer

Allotype

Question 10

10. After crossing of pure breed tall plant with round seed and short plant with wrinkled seeds ,the possible outcome of F₂generation will be :

Accepted Answer

All of the above

Answer

short plant with round seed

Answer

tall plant with wrinkled seeds

Answer

tall plant with round seeds

Question 11

11. How many pairs of sex chromosomes are present in zygote of human beings?

Accepted Answer

1

Answer

4

Answer

2

Answer

3

Question 12

12. Which of the following is heterozygous?

Accepted Answer

Rr

Answer

RR

Answer

rrtt

Answer

RRTT

Question 13

Assertion and Reason questions 13-17

13. Assertion: Chromosomes other than the pair of sex-chromosomes are called alleles

Reason: Alleles control different expressions of the same character

Accepted Answer

(A) is false but (R) is true

Answer

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

Answer

(A) is true but (R) is false

Answer

Both (A) and (R) are true,and (R) is the correct explanation of (A)

Question 14

14. Assertion: Genotype is the gene complement of an individual

Reason: For recessive gene,the phenotype is dissimilar to genotype.

Accepted Answer

(A) is true ,but (R) is false

Answer

(A) is false ,but (R) is true

Answer

Both (A) and (R) are true and (R) is the not the correct explanation of (A)

Answer

Both (A) and (R) are true and (R) is the correct explanation of (A)

Question 15

15. Assertion: Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them.

Reason: Formation of hypertonic solution which results in plasmolysis.

Accepted Answer

Both (A) and (R) are true ,and (R) is the correct explanation of (A)

Answer

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

Answer

(A) is true but (R) is false

Answer

(A) is false but (R) is true

Question 16

16. Assertion: potato cubes when placed in water become firm and increase in size.

Reason: Potato tuber cells have very high absorbing capacity.

Accepted Answer

(A) is true but (R) is false

Answer

Both (A) and (R) are true,and (R) is the not the correct explanation of (A).

Answer

(A) is false but (R) is true

Answer

Both (A) and (R) are true,and (R) is the correct explanation of (A).

Question 17

17. Assertion: High concentration of salt is added to pickles

Reason: It allows pickle to be preserved for long duration.

Accepted Answer

Both (A) and (B) are true ,and (R) is the correct explanation of (A)

Answer

(A) is true but (R) is false

Answer

(A) is false but (R) is true

Answer

Both (A) and (B) are true ,and (R) is not the correct explanation of (A)

Question 18

18. Name the phenomenon that is labelled A in the diagram.

Accepted Answer

Transpiration

Answer

Guttation

Answer

Photosynthesis

Answer

Bleeding

Question 19

19.What does arrow B indicates?

Accepted Answer

Translocation of water

Answer

Growth of the tree

Answer

Height of the tree

Answer

Thickness of stem

Question 20

20. What process does arrow C indicates in relevance to the diagram?

Accepted Answer

Absorption of water by roots

Answer

Root respiration

Answer

Translocation of sucrose

Answer

Photosynthesis

Question 21

21. A factor that will increase the rate of the phenomenon shown by A :

Accepted Answer

Wind velocity

Answer

Age of plant

Answer

Height of plant

Answer

Soil minerals

Question 22

22. Name the parts labelled as A and B.

Accepted Answer

A- Cell wall, B - cell membrane

Answer

A- Cell wall , B- Cell cytoplasm

Answer

A- Cell membrane , B- Cell wall

Answer

A- Cell nucleus, B- Cell membrane

Question 23

23. The root hair cell is in a turgid state. Which process is responsible for this state?

Accepted Answer

Endosmosis

Answer

Imbibition

Answer

Translocation

Answer

Exosmosis

Question 24

24. Which pressure is exerted by the cells of roots that helps in water movement?

Accepted Answer

Root pressure

Answer

Turgor pressure

Answer

Wall pressure

Answer

No pressure

Question 25

photolysis of water

Accepted Answer

Splitting of water molecules in the chloroplast in presence of light

Answer

Spitting of water molecules in the mitochondria in presence of light

Answer

Spitting of water molecules in the chloroplast in absence of light

Answer

Transpiration of water molecule from the chloroplast in presence of light

Question 26

Photophosphorylation

Accepted Answer

The process of conversion of ADP into ATP during photosynthesis

Answer

The process of conversion of ATP into ADP during photosynthesis

Answer

The process of conversion of ATP into ADP during respiration

Answer

The process of conversion of ADP into ATP turning respiration

Question 27

Destarching

Accepted Answer

The process in which plant is kept in the dark to remove the starch from the leaves

Answer

The process in which plant is kept in the dark to remove the starch from the roots

Answer

The process in which plant is kept in the dark to accumulate the starch from the leaves

Answer

The process in which plant is kept in the light to remove the starch from the leaves

Question 28

Autotrophs

Accepted Answer

Organism manufacturing their own food.

Answer

Organism manufacturing their own soil

Answer

Organism who can't manufacturing their own food.

Answer

Organism manufacturing food automatically

Question 29

Chloroplast

Accepted Answer

To perform photosynthesis

Answer

to perform respiration

Answer

To synthesis DNA

Answer

to synthesis protein

Question 30

Guard cells

Accepted Answer

Regulate CO₂ influx from the atmosphere into the leaves for photosynthetic carbon fixation.

Answer

Regulate O₂influx from the atmosphere into the leaves for photosynthetic oxygen fixation.

Answer

Regulate O₂influx from the atmosphere into the leaves for photosynthetic oxygen fixation.

Question 31

Phloem

Accepted Answer

Transports starch from the leaves to all parts of the plant body.

Answer

Transports proteins from the leaves to all parts of the plant body.

Answer

Transports starch from the flowers to all parts of the plant body

Answer

Transports starch from the roots to all parts of the plan body

Question 32

Stroma

Accepted Answer

Performs dark reactions of photosynthesis

Answer

Performs light reactions of photosynthesis

Answer

Performs dark reactions of respiration.

Answer

Performs light and dark reactions of photosynthesis.

Question 33

State the exact location of the following :

Thylakoids

Accepted Answer

In chloroplast

Answer

In chromoplast

Answer

In mitochondria

Answer

In cytoplasm

Question 34

State the exact location of the following:

chloroplast

Accepted Answer

In mesophyll cells

Answer

In root cells

Answer

In phloem tissue

Answer

In another

Question 35

State the exact location of the following:

Grana

Accepted Answer

In Stroma

Answer

In nucleoplasm

Answer

Inside thylakoid

Answer

Inside cytoplasm

Question 36

When a plant is kept in a dark room for about 48 hrs before conducting any experiment on photosynthesis to :

Accepted Answer

Ensure that the leaves are free from starch.

Answer

Remove starch from the plant

Answer

Ensure that no photosynthesis occurs

Answer

Remove chlorophyll from leaves

Question 37

In the destarched plant, the leaves become decolorise as the

Accepted Answer

Leaves are free from starch

Answer

Ensure that no photosynthesis occurs

Answer

Aerial parts are free from starch

Answer

Leaves are free from chlorophyll

Question 38

Each flattened stacks of membranous coined like structure inside the chloroplast are known as :

Accepted Answer

Grana

Answer

Cristae

Answer

Stroma

Answer

Thylakoids

Question 39

The process of conversion of several molecules or glucose to one molecule of starch is called

Accepted Answer

Polymerization

Answer

Polysynthesis

Answer

Polyacylation

Answer

Polypeptidation

Question 40

Which type of tissue transports starch from the leaves to all parts of the plant body

Accepted Answer

Phloem

Answer

Collenchyma

Answer

Xylem

Answer

Parenchyma

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