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) : Inheritance from the previous generation provides subtle changes in body design for the next generation. Reason (R) : Greater diversity will be generated if asexual reproduction is involved.

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

Laws of inheritance were proposed by

Isaac Newton

Mendel

Thomas Edison

None of these

4 / 25

Who is the Father of Genetics ?

Thomas Edison

charles Darwin

Mendel

none of these

5 / 25

A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants as:

Tallness is the dominant trait

Shortness is the dominant trait

Tallness is the recessive trait

Height of plant is not governed by gene t or t

6 / 25

A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the exact homologous structures?

Carrot and potato

Carrot and tomato

Radish and carrot

Radish and potato

7 / 25

From the list given below, select the character which can be acquired but not inherited:

Colour of eyes

Colour of skin

Size of body

Nature of hair

8 / 25

Name the organ analogous to the wings of birds.

Forelimb of human

Wings of insect

Fore-leg of horse

None of these

9 / 25

Offspring produced by asexual method of reproduction have more similarity among themselves because:

Asexual reproduction involves only one parent

Asexual reproduction does not involve gametes

Asexual reproduction occurs before sexual reproduction

Asexual reproduction occurs after sexual reproduction

10 / 25

The number of chromosomes in parents and offsprings of a particular species remains constant due to: Halving of chromosomes during gamete formation

Doubling of chromosomes after zygote formation

Halving of chromosomes during gamete formation

Doubling of chromosomes after gamete formation

Halving of chromosomes after gamate formation

11 / 25

The characteristics transmitted from parents to ofspring are present in

Cytoplasm

Ribosome

Golgi bodies

Genes

12 / 25

Assertion (A): Variation is useful for the survival of species over time. Reason (R) : Populations of organisms fill well-defined places in the ecosystem, using their ability to reproduce

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

13 / 25

Name the organ that produces sperms in human males.

Testes

Testosterone

Both 1 & 2

None Of These

14 / 25

In flowers,what is the female reproductive part called as?

Pistil Or Carpel

Ovaries

Filaments

Stigma

15 / 25

Which of the following is surgical method of birth control in females?

Tubectomy

Vasectomy

Both 1 & 2

None Of These

16 / 25

The number of chromosomes shared from both male & female are

26 from each

23 from each

46 from each

12 from each

17 / 25

Which one of the following declaration is accurate about the human circulatory system?

Blood transports only oxygen and not carbon dioxide.

Human heart has five chambers.

Valves ensure that the blood does not flow backwards

Both oxygen-rich and oxygen-defcient blood gets mixed in the heart.

18 / 25

Most of the digestion and absorption of the food occur in the:

Small intestine

Liver

Stomach

Large intestine

19 / 25

Which is the true sequence of air passage during inhalation?

Nostrils → Larynx → Pharynx → Trachea → Lungs

Nasal passage → Trachea → Pharynx → Larynx → Alveoli

Larynx → Nostrils → Pharynx → Lungs

Nostrils → Pharynx → Larynx → Trachea → Alveoli

20 / 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

21 / 25

The red pigment which carries oxygen in the blood.

Haemoglobin

Platelets

Veins

Capillaries

22 / 25

Human skin is impermeable to gas because

to minimise the loss of water from the skin

to maximise the loss of water from the skin

to minimise /maximise the loss of water from the skin

none of these

23 / 25

What does a low hemoglobin level mean?

referred to as low red blood count.

referred to as high red blood count.

referred to as low/high red blood count.

none of these

24 / 25

How many chambers are there in the heart of an Human being?

2

4

3

1

25 / 25

Which of the following is an important component of haemoglobin

calcium

potassium

Sodium

Iron

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CBSE Class X – Science Biology Exam ( Full Syllabus)

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