(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

State whether the following sentence is true or false:

The two DNA chains are parallel to each other.

State whether the following sentence is true or false:

Genes are arranged in a linear order on a chromosome.

State whether the following sentence is true or false:

In any specimen of DNA, the total molar amount of A + G = T+ C.

Choose the correct answer:
This structure is not present in all chromosomes ___________

Choose the correct answer:
Sex chromosomes in man are _____________

Choose the correct answer :
DNA model was given by ___________

Choose the correct answer :
 Adenine is a __________

Choose the correct answer :
Spirally coiled double strands are observed in ____________

Choose the correct answer :
RNA has uracil instead of ____________

Choose the correct answer :
Which of these is not present in DNA?

The apparatus shown here is Ganong's photometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl₂) contained in two small vials were weighted and placed in both the cups. The ends of the cups were weighted and with corks through which two mercury manometers were connected. After a few hours, CaCl₂ vials were taken out and weighed again.
(i) What is the purpose of keeping CaCl₂ vials inside the cup?
(ii) After a few hours, CaCl₂ vials were taken out and weighed again.
will you except any difference in weight? If so, give reasons.
(iii) What was expect the purpose of using a manometer?
(iv) What do you mean by transpiration?

Rapidly growing industries favoured population rise

Given below is the diagram of an apparatus used to study a particular phenomenon in plants:

1. Name the apparatus.
2. What is it used for?
3. What is the role played by the air-bubble in this experiment?
4. What is the use of the reservoir?
5. What happens to the movement of the air-bubble if the apparatus is kept:
   1. in the dark
   2. in sunlight
   3. in front of a fan?
      Give a reason in each case.

Given below is the diagram of an apparatus used to study a particular phenomenon in plants:

What is it used for?

Given below is the diagram of an apparatus used to study a particular phenomenon in plants:

What is the role played by the air-bubble in this experiment?

Given below is the diagram of an apparatus used to study a particular phenomenon in plants:

What is the use of the reservoir?

Given below is the diagram of an apparatus used to study a particular phenomenon in plants:

What happens to the movement of the air-bubble if the apparatus is kept:

(i) In the dark

(ii) In sunlight

(iii) In front of a fan

Give a reason in each case.

The apparatus shown in the following diagram is Garreau’s potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl₂) contained in two small vials were weighed and placed in both the cups. The ends of the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl₂  vials were taken out and weighed again.

What is the purpose of keeping CaCl₂ vials inside the cup?

The apparatus shown in the following diagram is Garreau’s potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl₂) contained in two small vials were weighed and placed in both the cups. The ends of the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl₂  vials were taken out and weighed again.

After few hours CaCl₂ vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason.