Sail E0 Webinar

9th Grade > Biology

THE FUNDAMENTAL UNIT OF LIFE MCQs

Total Questions : 55 | Page 1 of 6 pages
Question 1. Mitochondria are able to make their own proteins.
  1.    True
  2.    False
  3.    Vacuoles occupy 50-90% of the cell volume in plant cells.
  4.    In amoeba, food vacuoles digests food.
 Discuss Question
Answer: Option A. -> True
:
A
Mitochondria are specialised cell organelles which serve as batteries, powering various functions of the cell and an organism as a whole.
They have their own genetic material and ribosomes which helps in synthesising proteins.
Question 2. The primary function of leucoplasts is ___ .
 Discuss Question

:
Leucoplasts are the white or colourless plastids. They are the primary organelles for storage of materials such as starch, oils, protein granules, etc.
Example: Leucoplasts are found in root cells, pulses, groundnut, etc.
Question 3. Why is cell membrane called a selectively permeable membrane?
  1.    It is permeable only during certain stage of the cell division.
  2.    It allows only selective molecules to pass through it.
  3.    It allows only water to pass.
  4.    It is made up of lipids.
 Discuss Question
Answer: Option B. -> It allows only selective molecules to pass through it.
:
B
Plasma membrane is an external covering of the cell. It separates the contents of the cell from the external surroundings. Since, it allows the entry and exit of only certain substances (e.g., molecules, ions, etc.) it is known as a selectively permeable membrane.
Question 4. Which of the following organelle is called as the 'suicide bags' of the cell?
  1.    Mitochondria
  2.    Lysosomes
  3.    Golgi apparatus
  4.    Endoplasmic reticulum
 Discuss Question
Answer: Option B. -> Lysosomes
:
B
Lysosomes are called the 'suicide bags'of the cell. They contain digestive enzymes that break down wastes, foreign substances and cellular debris. Apart from these, lysosomes also digest cells by their own protein-digesting enzymes, leading to cell death.
Question 5. Gases like carbon dioxide and oxygen can move across the cell membrane.
  1.    True
  2.    False
  3.    Lysosomes
  4.    Chloroplasts
 Discuss Question
Answer: Option A. -> True
:
A
Gaseslike carbon dioxide and oxygencrossthemembraneby the process of diffusion and movefrom the region of higher concentration to that of lower concentration across the cell membrane.
Question 6. Leucoplasts are present in___.
  1.    plant cells only
  2.    both plant and animal cells
  3.    animal cells only
  4.    neither plant nor animal cell
 Discuss Question
Answer: Option A. -> plant cells only
:
A
Leucoplasts are the non-pigmented organelles which are colorless. They are usually found in most of the non-photosynthetic parts of the plant like roots. They act as a storage shed for starches, lipids, and proteins depending on the needs of plant.
Question 7. In a non-dividing cell, DNA is present as a mass of thread-like structures known as _______ .
  1.    ribosomes
  2.    chromatin
  3.    cytoplasm
  4.    chromosome
 Discuss Question
Answer: Option B. -> chromatin
:
B
In a cell which is not dividing,DNA is present as part of chromatin fibres/material. These are called chromatin because they get coloured when they are stained. This chromatin material is visible as an entangled mass of thread-like structures. Whenever the cell is about to divide, the chromatin material gets condensed andorganised into chromosomes.
Question 8. What are the cellular flattened sacs, discovered by Camillo Golgi?
  1.    Plastid
  2.    Mitochondria
  3.    Golgi apparatus
  4.    Endoplasmic reticulum 
 Discuss Question
Answer: Option C. -> Golgi apparatus
:
C
The Golgi apparatus was first described by Camillo Golgi, who is renowned for his work on the nervous system.
He described the golgi apparatus as an organelle consisting of a system of membrane-bound vesicles arranged approximately parallel to each other in stacks called cisternae.
Question 9. Identify The Cell Organelle.
Identify the cell organelle.
  1.    Plastid
  2.    Golgi apparatus
  3.    Mitochondrion
  4.    Lysosome
 Discuss Question
Answer: Option C. -> Mitochondrion
:
C
The organelle depicted in the given image is a mitochondrion. It is a double-membranedorganelle with its own genetic material. Sinceit is involved in the production of energy-rich ATP (Adenosine triphopshate), it is also known as the "powerhouse of the cell".
Question 10. Unlike the division of labour seen in the multicellular organisms, there is no division of labour within a single cell.
  1.    True
  2.    False
  3.    He observed the dead cells of cork.
  4.    He discovered the nucleus in the cell.
 Discuss Question
Answer: Option B. -> False
:
B
The fundamental unit of life - cell, exhibits a finedivision of labour within itself. Cellular organelles are designated to performspecific functions responsible for the normal metabolism of the cell, such as making new material in the cell, clearing up the waste material from the cell and so on.

Latest Videos

Latest Test Papers