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

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

2 / 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

3 / 25

The gene type of green stemmed tomato plants is denoted as GG and that of purple stemmed tomato plants as gg. What colour of stem would you expect in F1 progeny when these two are crossed?

As green stem is a dominant trait as compared to purple stem, the colour of stem would be green in F1 progeny

As green stem is a dominant trait as compared to purple stem, the colour of stem would be Blue in F1 progeny

As green stem is a dominant trait as compared to purple stem, the colour of stem would be violet in F1 progeny

none of these

4 / 25

Laws of inheritance were proposed by

Isaac Newton

Mendel

Thomas Edison

None of these

5 / 25

The Phenomeneon of Natural Selection was done by

Charles Darwin

Mendel

Thomas Edison

None of these

6 / 25

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

Boy

Girl

Y chromosome does not determine the sex of a child

Either boy or girl

7 / 25

As claimed by the evolutionary theory, formation of a new species is generally due to

Sudden creation by nature.

Accumulation of variations over several generations

Clones formed during asexual reproduction.

Movement of individuals from one habitat to another

8 / 25

In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

1 : 3

3:01

1:01

2:01

9 / 25

The ability of a cell to divide into several cells during reproduction in Plasmodium is called

Budding vision

Reduction division

Binary fission multiple fission

Multiple fission

10 / 25

Which among the following statements are true for sexual reproduction in fowering plants?

It requires two types of gametes.

Fertilisation is a compulsory event.

It always results in the formation of zygote.

Offsprings formed are clone

1 , 2 and 3

2 and 3

1 and 3

2 and 4

11 / 25

Example of bisexual fowers.

Watermelon

Papaya

Hibiscus

Corn

12 / 25

Name the harmone secretes a sperms in human males.

Testosterone

Testes

Both 1 & 2

All Of These

13 / 25

What do you understand by Puberty?

The age at which the reproductive organs of boys and girls become non functional.

The age at which the reproductive organs of boys and girls become functional.

It is a process of fertilisation in boys and girls.

None of these

14 / 25

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

Pistil Or Carpel

Ovaries

Filaments

Stigma

15 / 25

Blocking of fallopian tubes prevents ?

Pregnancy

Sexually transmitted diseases

Genetic uniformity

None Of These

16 / 25

Total number of chromosomes present in human beings are

46

23

24

48

17 / 25

If salivary amylase is lacking in the saliva, which of the Subsequent events in the mouth cavity will be affected?

Proteins breaking down into amino acids

Starch breaking down into sugars

Cats breaking down into fatty acids and glycerol

Absorption of vitamins

18 / 25

Which part of alimentary canal collects bile from the liver?

Stomach

Small intestine

Large intestine

Oesophagus

19 / 25

Pseudopodia are:

Small hair-like structures present on unicellular organisms.

False feet developed in some unicellular organisms

Long, tube-like structures coming out of the mouth

Suckers which are attached to the walls of the intestines. glomerulus and tubular region (Renal tubule). Glucose, amino acids and salts are selectively reabsorbed in tabular region

20 / 25

Which of the following declaration (s) is (are) true about respiration? (i)During inhalation, ribs move inward and diaphragm is raised. (ii) In the alveoli, exchange of gases takes place i.e. oxygen form alveolar air diffuses into blood and carbon dioxide from blood into alveolar air. (iii) Haemoglobin has greater afinity for carbon dioxide than oxygen. (iv) Alveoli increases surface area for exchange of gases.

2 and 4

1 and 4

2 and 3

1 and 3

21 / 25

Select the event that does not materialise in photosynthesis.

Absorption of light energy by chlorophyll

Reduction of carbon dioxide to carbohydrates

Oxidation of carbon to carbon dioxide

Conversion of light energy to chemical energy

22 / 25

The red pigment which carries oxygen in the blood.

Haemoglobin

Platelets

Veins

Capillaries

23 / 25

Which one of the following diets would you recommended to the affected patient?

High sugar and low fat diet.

Low sugar and high protein diet.

High Carb and low fiber diet.

Low sugar and high fiber diet

24 / 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

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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