Showing
7
question(s) for
UK Class 10
—
Subject:
Science
Science
Q1.
What is the difference between mitosis and meiosis?
Answer:
Mitosis produces genetically similar cells used mainly for growth, repair and replacement, while meiosis produces genetically varied reproductive cells with half the usual chromosome number.
Science
Q2.
Why is DNA important in living organisms?
Answer:
DNA contains genetic information that provides instructions for making proteins and contributes to inherited characteristics.
Science
Q3.
What is the difference between a gene and a chromosome?
Answer:
A gene is a section of DNA containing information related to a characteristic or biological function, while a chromosome is a long DNA molecule associated with proteins and containing many genes.
Science
Q4.
Why does increasing the concentration of reactants often increase reaction rate?
Answer:
A higher concentration means more reacting particles are present in a given volume, increasing the frequency of collisions and therefore usually increasing the reaction rate.
Science
Q5.
What is activation energy?
Answer:
Activation energy is the minimum amount of energy that reacting particles must have for a successful chemical reaction to occur.
Science
Q6.
How does a catalyst affect a chemical reaction?
Answer:
A catalyst provides an alternative reaction pathway with a lower activation energy, increasing the reaction rate without being permanently used up.
Science
Q7.
Why does increasing the thickness of insulation reduce heat transfer?
Answer:
A thicker layer of insulation increases the distance through which thermal energy must be transferred and reduces the rate of energy transfer.