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

Mendel crossed the round and green seeded pea plants with the wrinkled and yellow seeded pea plants. Give the phenotypic ratio of F2 generation.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 9 : 3 : 2: 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 8 : 3 : 3 : 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 9 : 3 : 3 : 1.

Round Yellow : Round Green : Wrinkled Yellow : wrinkled Green = 4: 3 : 3 : 1.

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

The first person to give scientific explanation for the mechanism of transmission of characters from parents to the offsprings.

Charles Darwin

Mendel

Thomas Edison

none of these

5 / 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

6 / 25

Select the group which shares the maximum number of common characters

Two species of a genus

Two genera of a family

Two individuals of a species

Two genera of two families

7 / 25

Which of the subsiquent is not a direct conclusion that can be drawn from Mendels experiment?

Only one parental trait is expressed.

Two copies of each trait are inherited in sexually reproducing organism

For recessive trait to be expressed, both copies should be identical

Natural selection can alter frequency of an inherited trait.

8 / 25

If the fossil of an organism is found in the deeper layers of earth, then we can predict that:

The extinction of the organism occurred recently

The extinction of the organism occurred thousands of years ago

The fossil position in the layers of Earth is not related to its time of extinction.

The time of extinction cannot be determined.

9 / 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

10 / 25

The number of chromosomes in parents and ofsprings of a particular species remains unchanged due to

Doubling of chromosomes during gamate formation.

Halving of chromosomes during gamate formation

Halving of chromosomes during zygote formation

Doubling of chromosomes during gamate formation

11 / 25

Example of bisexual fowers.

Watermelon

Papaya

Hibiscus

Corn

12 / 25

What is the mode of asexual reproduction in planaria?

Spore Formation

Fragmentation

Binary Fission

Regeneration

13 / 25

Name the harmone secretes a sperms in human males.

Testosterone

Testes

Both 1 & 2

All Of These

14 / 25

The site of fertilization of the ovum takes place is

Ovaries

Fallopian Tube

Callopian Tube

None Of These

15 / 25

Which pollination increases genetic uniformity and decreases variations

Cross Pollination

Self Pollination

Both 1 & 2

None Of These

16 / 25

A surgical method of Blocking vas deferens to prevent pregnancy is done for

Females

Males

Both 1 & 2

None Of These

17 / 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

18 / 25

A few drops of iodine solution were put on to rice water. The solution turned blue-black in colour. This specify that the rice water contains:

Complex proteins

Simple proteins

Cats

Starch

19 / 25

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

Small intestine

Liver

Stomach

Large intestine

20 / 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

21 / 25

Oxygen liberated during photosynthesis comes from:

Water

Chlorophyll

Carbon dioxide

Glucose

22 / 25

The opening and closing of the stomatal pore depends upon:

Oxygen

Temperature

Water in guard cells

Concentration of CO2 in stomata

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

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

25 / 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

Your score is

0%

CBSE Class X – Science Biology Exam ( Full Syllabus)

Archives

Categories