Question

For the following questions, two sentences are given. One labelled Assertion (A) and the
other labelled Reason (R). Select the correct answer to these questions from the codes (i),
(ii), (iii) and (iv) as given below:
(i) Both A and R, are true and R is the correct explanation of A.
(ii) Both A and R, are true but R is not the correct explanation of A.
(iii) If A is true but R is false.
(iv) If A is false but R is true.
1. Assertion (A): Chromatin material is seen as entangled mass of thread like structures.
Reason (R): When the cell is about to divide, the chromatin material gets organised into
chromosomes.
2. Assertion (A): Viruses lack cell membrane.
Reason (R): They are prokaryotes.
3. Assertion (A): The internal structure of plastid has many layers embedded in stroma.
Reason (R): Plastids have their own DNA.
4. Assertion (A): By a method called ‘White reaction’, Camillo Golgi stained the cells.
Reason (R): For this he used a weak solution of silver nitrate.
5. Assertion (A): Mitosis involves the production of two identical daughter cells.
Reason (R): It helps in the growth and repair of tissues.
6. Assertion (A): Energy is released by the mitochondria in the form of ATP.
Reason (R): The body uses energy from ATP for various activities.
7. Assertion (A): Lysosomes may burst when there is a disturbance in cellular metabolism.
Reason (R): For this suicidal action, they get enzymes from SER.
8. Assertion (A): An egg is deshelled using dilute HCl.
Reason (R): The deshelled egg shrinks in concentrated sugar solution.
9. Assertion (A): The glass slide with the specimen is placed on the stage of the microscope.
Reason (R): The objective lens is at the top part of the microscope, where we view the
specimen.
10. Assertion (A): Purkinje discovered the nucleus of the cell.
Reason (R): He coined the term Protoplasm for the fluid substance of the cell.

Answer 1

Answer ⤵️

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally "milky", a reference to the Milky Way