Assertion Reason type questions Question number 1 to 5 are are Assertion(A)-Reason(R) type questions. In each of the following question a statement of Assertion is given by the corresponding statement of Reason.
Mark the correct answer as-
(a)lf both assertion and reason are true and reason is correct explanation of assertion
(b)Both assertion and reason are true but reason is not the correct explanation of assertion
(c) Assertion is true but reason is false
(d) Assertion is false but reason is true
(e) Both assertion and reason are false
Q1. (A) Robert brown discovered nucleus (R) Nucleoplasm And Cytoplasm Of A Living Cell Together Form The Cytoplasm
Q2. (A) Lysosomes are often called as suicidal bags of a cell
(R) Lysosomes contain hydrolytic enzymes capable of digesting cellular waste
Q3. (A) Displacement of body may be zero even when distance is not zero
(R) Displacement and distance both are scalar quantities
Q4. (A) Speed of a body is distance travelled in unit time
(R) Speed is always equal or greater than velocity
Q5. (A) The position time graph of an object in uniform motion is a straight line (R) Uniform motion object covers equal distance in equal interval of time.
Answers
Answer:
Q.1-
Explanation:Reason: All living organisms are made up of cells, The cell is the fundamental unit of life, All cells are arising from the pre-existing cells. 2. Assertion: Robert Brown discovered nucleus. Reason: Nucleoplasm and cytoplasm together form the protoplasm.
Q.2-Option A: Lysosomes are known as suicidal bags, because sometimes, the digestive enzymes of lysosomes end up damaging lysosomes itself, which results in the death of the cells. This phenomenon is known as autolysis. Hence lysosomes are known as suicidal bags. Therefore, this is the correct option.
Q.3-The displacement is the shortest distance between initial and final position. When final position of a body coincides with its initial position, displacement is zero, but the distance traveled is not zero .
4-There is more to motion than distance and displacement. Questions such as, “How long does a foot race take?” and “What was the runner’s speed?” cannot be answered without an understanding of other concepts. In this section we add definitions of time, velocity, and speed to expand our description of motion