Question 1
Topic – A2.2.10
Below is image of human body cell showing nucleus.
which of the following is true regarding nucleus?
A. It is composed of highly folded internal membranes and a liquid matrix.
B. It contains ribosomes and is the main site of protein synthesis in a cell.
C. It contains membrane-bound organelles.
D. It contains chromatin and is surrounded by a double membrane.
▶️Answer/Explanation
Ans: C
The nucleus of a cell is the organelle that contains the cell’s DNA, RNA, and proteins, and is responsible for regulating gene expression.
The nucleus is located in the middle of the cell and is surrounded by a double membrane.
The nucleus is the cell’s control center and is responsible for DNA replication, transcription, RNA processing, and regulating gene expression.
Question 2
Topic – A2.2.7
Following image shows paramecium. Paramecium ingests cells like algae and derives energy from them .
What can be deduced about Paramecium?
A. It is an autotroph.
B. It cannot perform all of the functions of life.
C. It carries out heterotrophic nutrition.
D. It is a prokaryote.
▶️Answer/Explanation
Ans: B
Heterotrophic nutrition is a mode of nutrition where organisms are unable to make their own food and instead depend on other organisms for food and energy.