Question

1. Which organelle is called the "powerhouse of the cell"?
A. Nucleus
B. Endoplasmic reticulum
C. Mitochondrion
D. Golgi apparatus

2. Which of the following instruments can be used to observe cells?
A. Barometer
B. Microscope
C. Periscope
D. Telescope

3. Which of the following scientists discovered cells in cork slices?
A. Louis Pasteur
B. Antonie van Leeuwenhoek
C. Carl Linnaeus
D. Robert Hooke

4. Which among the following organelles synthesizes lipids ?
A. Smooth Endoplasmic Reticulum
B. Rough Endoplasmic Reticulum
C. Golgi apparatus
D. Lysosome


5. Which of the following statements is incorrect about Endoplasmic Reticutum?
A. It is involved in lipid synthesis.
B. It is involved in ribosome synthesis .
C. it is the post office of the cell.
D. Involved in detoxifying chemicals



6. Which among the following is not the function of lysosomes?

A. Breaking down of food particles
B. Protection against the pathogens.
C. Perform photosynthesis.
D. Digest worn-out cells.


7. Assertion

(A): Chromosomes are responsible for the transfer of characteristics from parents to offspring.

Reason (R): Chromosomes are present in the nuceus.

A. Both A and R are true and R is the correct explanation of A
B. A is true but R is false
C. A is false but R is true
D. Both A and R are true but R is not the correct explanation of A

◉ MCQ type question
○ choose the correct option ​

Answer 1

1. Which organelle is called the "powerhouse of the cell"?

A. Nucleus

B. Endoplasmic reticulum

C. Mitochondrion ◉

D. Golgi apparatus

Answer: (C) Mitochondrion

Solution: The mitochondrion is called the "powerhouse of the cell " because it is responsible for producing energy-rich ATP molecules. Cells use ATP for all their energy needs.

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2. Which of the following instruments can be used to observe cells?

A. Barometer

B. Microscope ◉

C. Periscope

D. Telescope

Answer: (B) Microscope

Solution: A microscope is an optical instrument used to observe objects that are invisible to the naked eye. It is used to view and study cell structure. The science of viewing smal objects using a microscope is called microscopy.

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3. Which of the following scientists discovered cells in cork slices?

A. Louis Pasteur

B. Antonie van Leeuwenhoek

C. Carl Linnaeus

D. Robert Hooke ◉

Answer: (D) Robert Hooke

Solution: Robert Hooke in 1665 observed thin slices of cork under a simple magnitying device. He observed box-like structures and named them 'cell' . This is because these structures reminded him of the cells in a monastery.

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4. Which among the following organelles synthesizes lipids ?

A. Smooth Endoplasmic Reticulum ◉

B. Rough Endoplasmic Reticulum

C. Golgi apparatus

D. Lysosome

Answer: (A) Smooth Endoplasmic Reticulum

Solution: Lipids are synthesised by the Smooth Endoplasmic Reticulum (SER), while the Rough Endoplasmic Reticulum (RER) synthesises proteins with the help of ribosomes attached to them

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5. Which of the following statements is incorrect about Endoplasmic Reticulum?

A. It is involved in ribosome synthesis.

B. It is involved in ribosome synthesis .

C. it is the post office of the cell. ◉

D. Involved in detoxifying chemicals

Answer: (C) It is the post office of the cell

Solution:

• Golgi apparatus is called the post office of the cell since it is involved in the packaging , processing and transportation of substance

• SER( smooth endoplasmic reticulum) is involved in detoxification of lipids synthesis, while RER is involved in protein synthesis . ribosomes are not synthesized by ER .

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6. Which among the following is not the function of lysosomes?

A Breaking down of food particles

B. Protection against the pathogens.

C. Perform photosynthesis. ◉

D. Digest worn-out cells.

Answer: (C) Perform photosynthesis

Solution: Lysosomes break down and digest food particles in a cell. They also help the cell to protect itself from pathogens, by forming a complex along with the pathogen, called phagosome. They also aid in recycling proteins and digest worm-out cells. Hence, they are known as the 'suicidal bags'. But they do not aid in photosynthesis.

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7. Assertion

(A): Chromosomes are responsible for the transfer of characteristics from parents to offspring.

Reason (R): Chromosomes are present in the nucleus.

A. Both A and R are true and R is the correct explanation of A

B. A is true but R is false

C. A is false but R is true

D. Both A and R are true but R is not the correct explanation of A ◉

Answer: (D ) Both A and R are true but R is not the correct explanation of A

Solution: In the nucleus, thread-like structures called chromosomes are present. These carry all the information needed by the cell to function and to reproduce. They are responsible for inheritance ie, transfer of characteristics from parents to the offspring. Hence, both the statements are correct . But Chromosomes being present in the nucleus has nothing to do with their function .

Answer 2

1. Which organelle is called the "powerhouse of the cell"?

A. Nucleus

B. Endoplasmic reticulum

C. Mitochondrion ✔

D. Golgi apparatus

Explanation:- The mitochondria is called the power house because it performs the function of oxidation and energy production of food.

2. Which of the following instruments can be used to observe cells?

A. Barometer

B. Microscope ✔

C. Periscope

D. Telescope

Explanation:- Microscope is a device with the help of which microscopic objects which are not visible to the eye, can also be seen.

3. Which of the following scientists discovered cells in cork slices?

A. Louis Pasteur

B. Antonie van Leeuwenhoek

C. Carl Linnaeus

D. Robert Hooke ✔

Explanation:- Cork is found in almost all trees, but cork is abundant on the trunks of some rare trees.

• Hooke's illustrations show the detailed shape and structure of a thinly sliced piece of cork.

4. Which among the following organelles synthesizes lipids ?

A. Smooth Endoplasmic Reticulum ✔

B. Rough Endoplasmic Reticulum

C. Golgi apparatus

D. Lysosome

Explanation:- SER is mainly found in muscle and liver cells storing glycogen.

• The SER is the main site of lipid synthesis and steroid hormone synthesis of the cytoplasm.

5. Which of the following statements is incorrect about Endoplasmic Reticulum?

A. It is involved in lipid synthesis.

B. It is involved in ribosome synthesis .

C. it is the post office of the cell ✔

D. Involved in detoxifying chemicals

Explanation:- It is found in all eukaryotic cells except mature RBC(red blood cells). It was discovered by a scientist named Porter.

6. Which among the following is not the function of lysosomes?

A. Breaking down of food particles

B. Protection against the pathogens.

C. Perform photosynthesis ✔

D. Digest worn-out cells.

Explanation:- Lysosomes are covered with round thalamus, which are found in the cell fluid of the animal cell.

7. Assertion

A. Both A and R are true and R is the correct explanation of A

B. A is true but R is false

C. A is false but R is true

D. Both A and R are true but R is not the correct explanation of A ✔

Explanation:- Offspring inherit genetic material and characteristics from their parents in the form of homologous chromosomes, and it contains unique pairs of DNA.

• Humans have 23 pairs of chromosomes and a set of them is inherited from each parent.