CBSE Class X – Science Biology Exam ( Full Syllabus)

This test is designed based on NCERT Syllabus for Class 10 Topics of Science – Biology

Each time random 25 questions will be displaced from the question bank of 500 + Questions
So we recommend you to retake the quiz till you have mastered all the questions

1 / 25

A zygote which has an X chromosome inherited from the father will develop into a

Boy

Girl

X chromosome does not determine the sex of a child

Either boy or girl

2 / 25

Assertion (A) : Acquired traits cannot be passed from one generation to next generation. Reason (R) : Inaccuracy during DNA copying of acquired trait is minimum.

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

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

(A) is true but (R) is false

(A) is false but (R) is true

3 / 25

Assertion (A) : New combination of traits are observed in F2 offspring when tall plants with round seeds are crossed with short plants with wrinkled seeds. Reason (R) : Tallness and round seed are both dominant traits.

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

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

(A) is true but (R) is false

(A) is false but (R) is true

4 / 25

The major function of cellular DNA is

to store information and pass it to ofspring.

to store information and pass it to parents.

to store information and not pass it to ofspring.

none of these

5 / 25

Select correct option about variation?

The differences in characteristics between individuals of the same species is called variation.

Variations arise in organisms during the process of copying the DNA due to which the DNA copies will be similar but not identical to the original

1

2

Both 1 & 2

None of these

6 / 25

Who is the Father of Genetics ?

Thomas Edison

charles Darwin

Mendel

none of these

7 / 25

A trait in an organism is infuenced by:

Paternal DNA only

Maternal DNA only

Both maternal and paternal DNA

Neither paternal nor maternal DNA

8 / 25

The two versions of a trait (character) which are brought in by the male and female gametes are located on:

Copies of the same chromosome

Two diferent chromosomes

Sex chromosomes

Any chromosome

9 / 25

Fertilisation is the process of

Transfer of male gamete to female gamete

Fusion of nuclei of male and female gamete.

Adhesion of male and female reproductive organs

The formation of gametes by a reproductive organ

10 / 25

Choose the precise statement(s) on budding in yeast from the following:

A parent cell divides into two or more daughter cells and here the parent identity is lost

In this the elongated nucleus divides to form two or more daughter nuclei.

A bud arises from a particular region on a parent body

After detaching from the parent body the bud grows into a new independent individual

11 / 25

The characteristics transmitted from parents to ofspring are present in

Cytoplasm

Ribosome

Golgi bodies

Genes

12 / 25

Which of the following statements are true for fowers?

Flowers are always bisexual

They are the sexual reproductive organs

They are produced in all groups of plants

After fertilization they give rise to fruits

2 And 4

1 and 2

2 and 3

1 and 4

13 / 25

During adolescence, several changes occur in the human body. mark one change from the following associated with sexual maturation in boys:

Loss of milk teeth

Increase in height

Cracking of voice

Weight gain

14 / 25

What is the mode of asexual reproduction in planaria?

Spore Formation

Fragmentation

Binary Fission

Regeneration

15 / 25

What is the mode of asexual reproduction in Rhizopus

Spore Formation

Fragmentation

Budding

Binary Fission

16 / 25

A small family is a happy family means

A couple with only two children.

A couple with only four children.

A couple with only three children.

A couple with only two children.

17 / 25

Which part of alimentary canal collects bile from the liver?

Stomach

Small intestine

Large intestine

Oesophagus

18 / 25

Single circulation, i.e., blood fows through the heart only once during one cycle of passage through the body, is manifested by:

Labeo, Chameleon, Salamander

Hippocampus, Exocoetus, Anabas

Hyla, Rana, Draco

Whale, dolphin, turtle

19 / 25

In the list of organisms given below, those that reproduce by the asexual method are:

Banana

Dog

Yeast

Amoeba

20 / 25

The opening and closing of the stomatal pore depends upon:

Oxygen

Temperature

Water in guard cells

Concentration of CO2 in stomata

21 / 25

How many chambers are there in the heart of an amphibian?

2

3

4

6

22 / 25

The ways in which glucose is oxidized to provide energy in various organisms

Aerobic respiration

Anaerobic Respiration

Aerobic & Anaerobic

none of these

23 / 25

The two substances which are selectively reabsorbed from Nephriitic filtrate into the blood.

Glucose and salts

haemoglobin and salts

Starch & Glucose

none of these

24 / 25

The Fluid collected in the Bowman’s capsule as a result of ultrafiltration is called

blood

urine

nephric filtrate

urea

25 / 25

Name an enzyme present in pancreatic juice

Trypsin

lipase

lipase & Trypsin

none of these

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CBSE Class X – Science Biology Exam ( Full Syllabus)

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