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) : A single copy of ‘T’ is enough to make the plant tall. Reason (R) : Tallness trait (T) in Mendel’s experiment is a dominant trait.

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

Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria?

Yes

No

It is difficult to say

none of these

3 / 25

Name the plant Mendel used of F1 & F2 generation cross of tall and short plant experiment.

Garden pea

Tomato

Brinjal

All vegetables

4 / 25

Total number of chromosomes along with the sex chromosomes that are present in a human female and a human male.

46

23

64

32

5 / 25

Exchange of genetic material takes place in:

Vegetative reproduction

Asexual reproduction

Sexual reproduction

Budding

6 / 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

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

Select the inappropriate statement:

The frequency of certain genes in a population change over several generations resulting in evolution.

The reduction in the weight of an organism due to starvation is genetically controlled.

Low weight parents can have heavy weight progeny.

Traits which are not inherited over generations do not cause evolution.

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

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

11 / 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

12 / 25

In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called

Filaments

Hyphae

Rhizoids

Roots

13 / 25

Slides of binary fission in Amoeba and budding in yeast were given for observa group of students. Some of the observations reported by the group are given below:

Cytokinesis was observed in the yeast cell.

A chain of buds were observed in Amoeba.

Single cell of Amoeba and single cell of yeast were undergoing binary fission and budding respectively

Elongated nucleus was dividing to form two daughter nuclei in Amoeba

3 and 4

2 and 3

3

1 and 4

14 / 25

What is the mode of asexual reproduction in Rhizopus

Spore Formation

Fragmentation

Budding

Binary Fission

15 / 25

Which pollination increases genetic uniformity and decreases variations

Cross Pollination

Self Pollination

Both 1 & 2

None Of These

16 / 25

Blocking of fallopian tubes prevents ?

Pregnancy

Sexually transmitted diseases

Genetic uniformity

None Of These

17 / 25

Select the function of the pancreatic Juice from the following:

Trypsin digests proteins and lipase carbohydrates

Trypsin digests emulsifed fats and lipase proteins

Trypsin and lipase digest fats

Trypsin digests proteins and lipase digests emulsifed fats droplets

18 / 25

When air is blown from mouth into a test tube suppress lime water, the lime water turns milky due to the presence of:

Oxygen

Carbon dioxide

Nitrogen

Water vapour

19 / 25

Which of the following is an inappropriate statement?

Organisms grow with time.

Organisms must repair and maintain their structure.

Movement of molecules does not take place among cells.

Energy is essential for life processes.

20 / 25

If human urine is allowed to stand for sometime, it smells of ammonia, why?

Urea present in urine gets decomposed into ammonia by the action of bacteria

Urea present in urine gets decomposed into ammonia by the action of virus.

Urea present in urine gets composed into ammonia by the action of bacteria

none of these

21 / 25

The rings of cartilage present in the throat ensure that the air passage

gets destroyed

collapse

does not collapse

none of these

22 / 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

23 / 25

Bowman’s capsules of nephrons acts as

transfer of urea

ultra filters

both 1 & 2

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

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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