Question 1

1. The complex molecule consisting of a DNA strand and a core of histones.

Accepted Answer

Nucleosome

Answer

Nucleotide

Answer

Chromosome

Answer

Centrosome

Question 2

2. The chromatids of two homologous chromosomes that show crossing over

Accepted Answer

non-sister chromatids

Answer

central chromatid

Answer

Homologous chromatid

Answer

sister chromatids

Question 3

3. Explain the term : Law of segregation

Accepted Answer

The two members of a pair of factors separate during the formation of gametes.

Answer

The two members of a pair of factors separate during the process of germination

Answer

The two chromosomes of a pair of factors separate during the formation of gametes

Answer

The two members of a pair of factors join during the formation of gametes.

Question 4

4. Active transport means:

Accepted Answer

passage of ions from its lower to higher concentration through a cell membrane using energy from the cell.

Answer

passage of water from its lower to higher concentration through a cell membrane using energy from the cell

Answer

passage of water from its lower to higher concentration through a cell membrane without any expenditure of energy.

Answer

passage of ions from its lower to higher concentration through a cell membrane without any expenditure of energy.

Question 5

5. The location of Palisade parenchyma is :

Accepted Answer

between the upper epidermis and spongy parenchyma of dicot leaves

Answer

between the lower epidermis and spongy parenchyma of dicot leaves

Answer

between the upper and lower epidermis of monocot leaves

Answer

between the upper and lower epidermis of dicot leaves

Question 6

6. The location of Root hair is :

Accepted Answer

Extension of epidermis

Answer

Extension of epithelium

Answer

Extension of endodermis

Answer

Extension of cortex

Question 7

7. Location of Thylakoids is :

Accepted Answer

In the stroma of chloroplast

Answer

In the chlorophyll

Answer

wall of chloroplast

Answer

In the inner membrane of the chloroplast

Question 8

8. Function of stroma is :

Accepted Answer

site of light independent phase of photosynthesis

Answer

site of photolysis of photosynthesis

Answer

site of photochemical phase of photosynthesis

Answer

site of light dependent phase of photosynthesis

Question 9

9. Function of guard cells is :

Accepted Answer

Regulate the opening and closing of stomata

Answer

Regulate the closing of stomata

Answer

Regulate the process of photosynthesis

Answer

Regulate the opening of stomata

Question 10

10. Marine fish when placed under tap water bursts ,because of :

Accepted Answer

Endodermis

Answer

Diffusion

Answer

Exosmosis

Answer

plasmolysis

Question 11

11. Identify the stage

Accepted Answer

prophase

Answer

interphase

Answer

metaphase

Answer

anaphase

Question 12

12. Name the phase that follows the one shown here

Accepted Answer

metaphase

Answer

anaphase

Answer

interphase

Answer

telophase

Question 13

13. What is the diploid number number of chromosomes shown in the diagram?

Accepted Answer

4

Answer

8

Answer

6

Answer

2

Question 14

14. Identify the cell organelle

Accepted Answer

chloroplast

Answer

Ribosome

Answer

Mitochondria

Answer

Lysosome

Question 15

15. Label the parts marked A,B &C

Accepted Answer

A- Stroma B- Granum C- Thylakoids

Answer

A- Granum B- Stroma C- Fret

Answer

A- Thylakoids B- Fret C- Granum

Question 16

16. The unit of light absorbed by chlorophyll is :

Accepted Answer

photons

Answer

proton

Answer

Neutron

Answer

Electron

Question 17

17. Function of Hydathodes

Accepted Answer

Helps in guttation

Answer

Helps in transportation of water

Answer

Helps in transpiration

Answer

Helps in imbibition

Question 18

18. Explain the term Disjunction

Accepted Answer

It is the separation of homologous chromosomes during cell division

Answer

It is the separation of separation of homologous chromosomes during DNA synthesis

Answer

It is the separation of homologous chromosomes during resting phase

Answer

It is the separation of homologous chromosomes during cell morphogenesis

Question 19

19. Explain the term Nucleotides

Accepted Answer

The repeating component of each DNA strand lengthwise

Answer

The repeating component of protein

Answer

Then on repeating component of each DNA strand lengthwise

Answer

The repeating component of carbohydrate

Question 20

20. Location of Centromere

Accepted Answer

At different positions on the chromosomes

Answer

Anywhere inside nucleus

Answer

On the centre of chromosome

Answer

At terminal positions on the chromosome

Question 21

21. Location of Histone proteins:

Accepted Answer

In association with DNA

Answer

In association with other cytoplasmic proteins

Answer

In association with nucleoplasm

Answer

In association with RNA

Question 22

22. Identify the type of gene, which in the presence of contrasting allele is not expressed.

Accepted Answer

Recessive

Answer

C0-recessive

Answer

Co-dominant

Answer

Dominant

Question 23

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

Accepted Answer

1

Answer

2

Answer

4

Answer

3

Question 24

24. Mendel selected sweet pea plant for his experiments because:

Accepted Answer

The pea plant is bisexual and self -pollinating in nature

Answer

Cross pollination is impossible in pea plants

Answer

All of the above

Answer

The pea plant has beautiful flowers

Question 25

25. Name the apparatus shown in diagram

Accepted Answer

potometer

Answer

Barometer

Answer

Respirometer

Answer

photometer

Question 26

26. Which phenomenon is demonstrated by this apparatus?

Accepted Answer

Transpiration

Answer

Respiration

Answer

Bleeding

Answer

photosynthesis

Question 27

27. What is the importance of air bubble in the experiment?

Accepted Answer

Helps to calculate the rate of transpiration in a given time

Answer

Helps in measuring length of water column

Answer

All of above

Answer

Helps to remove moisture

Question 28

28. What are/is the limitations of using this apparatus?

Accepted Answer

All the above

Answer

Introducing air bubble is difficult

Answer

Twig may not be alive for a long time

Answer

changes in the outside temperature/light/humidity affects the position of air bubble

Question 29

29. Name the structure of the plant through which the demonstrating process takes place in the set up apparatus.

Accepted Answer

Stomata

Answer

Nucleus

Answer

Chloroplast

Answer

Hydathode

Question 30

30. What is the process of conversion of ADP into ATP during photosynthesis called?

Accepted Answer

Photophosphorylation

Answer

Diphosphorylation

Answer

Oxidative phosphorylation

Answer

Dephosphorylation

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