Can anyone give me 20-30 mcqs questions for the chapter the fundamental unit of life class 9 it's very urgent plz give answer and don't Spam or Will be reported!!
Answers
Check below the important MCQs on The Fundamental Unit of Life Class 9:
1. A cell will swell up if
(a) The concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium.
(b) The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell.
(c) The concentration of water molecules is same in the cell and in the surrounding medium
(d) The concentration of water molecules does not matter.
Answer: (b) The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell.
2. Which of the following statement marks as a difference between plant cell and animal cell?
(a) Plant cells have cell wall which animal cells do not.
(b) Plant cells do not have vacuole while animal cells do have.
(c) Plant cells have only cell membrane while animal cells have both cell wall as well as cell membrane.
(d) Plant cells have more plastids while animal cells have few plastids.
Answer: (a) Plant cells have cell wall which animal cells do not.
3. Endoplasmic reticulum one of the cell organelles, exists as a membranous network that extends from outer membrane of nucleus to the plasma membrane making a connection between them.
(a) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it.
(b) Membranes are made of organic molecules such as proteins and lipids.
(c) Molecules soluble in organic solvents can easily pass through the membrane.
(d) Plasma membranes contain chitin sugar in plants.
Answer: (d) Plasma membranes contain chitin sugar in plants.
5. The nucleus controls all the activities of the cell and acts as a site of DNA material and protein synthesis. It is composed of some components which all together give the nucleus its functionality. Here is shown a figure of nucleus with some of its components labeled as A, B, C and D. can you name these components correctly?
Jagranjosh
(a) A – Nucleons; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(b) A – Nucleus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(c) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(d) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nuclear wall
Answer: (c) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
6. You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change.
(a) Chloroplasts change to chromosplasts
(b) Chromosplasts change to chromosomes
(c) Chloroplasts change to chromosomes
(d) Chromosplasts change to chloroplasts
Answer: (a) Chloroplasts change to chromosplasts
CBSE Class 9th Mathematics Solved Practice Paper for Annual Exam 2020
7. Rahul’s mother was going to make pickle. For this she cut the vegetables into small pieces and put them in the sun for few hours. Rahul was observing all her activities very curiously and asked his mother if why she had put the salted vegetables in the sun. among the following what might be the most appropriate answer for his question?
(a) So that the pickle may get extra flavour.
(b) So that the cut vegetables may absorb the vitamin d as a nutrient from the sun rays.
(c) So that the vegetables may lose all the water by diffusion and evaporation and become dry.
(d) So that the salt may get evenly and properly absorbed by the vegetables.
Answer: (c) So that the vegetables may lose all the water by diffusion and evaporation and become dry.
8. The process of plasmolysis in plant cell is defined as:
(a) Breakdown of plasma membrane in hypotonic solution.
(b) Shrinkage of cytoplasm in hypertonic medium.
(c) Shrinkage of Nucleoplasm.
(d) None of these.
Answer: (b) Shrinkage of cytoplasm in hypertonic medium.
CBSE Class 9 Mathematics NCERT Exemplar Problems: All Chapters PDF
9. Mitochondria are the sites of respiration in the cell. They oxidize carbohydrates and fats present in the cell to produce carbon dioxide, water and a lot of energy. The energy so released is stored in the form of ATP molecules. Since mitochondria in the cell are used to synthesize energy so, they are also called:
(a) Energy currency of the cell
(b) Energy generator of the cell
(c) Kitchen of the cell
(d) Power house of the cell
Answer: (d) Power house of the cell
Mcqs questions for the chapter the fundamental unit :
1. Which plastids are colourless ?
a. Chromoplasts
b. Chloroplast
c. Leucoplasts
d. All of the above
e. None of the above
2. An unripe green fruit changes colour when it ripens. The reason being:
a. Chromoplasts changes to chlorophyll
b. Chromoplasts changes to chromosomes
c. Chromosomes changes to chromoplasts
d. Chloroplast changes to chromoplasts
e. None of the above
3. The phenomenon where cytoplasms shrink in a hypertonic medium is called:
a. Frontolysis
b. Plasmolysis
c. Acidolysis
d. Allolysis
e. None of the above
4. ________ is called the energy currency of the cell
a. Endoplasmic reticulum
b. Oxygen
c. ATP
d. Mitochondria
e. None of the above
5. ________ is called the powerhouse of the cell
a. Mitochondria
b. ATP
c. Lysosomes
d. Red blood cells
e. None of the above
6. ________ coined the term “cell.”
a. Gorbachev
b. Himmler
c. Robert Hooke
d. Anton Von Leeuwenhoek
e. None of the above
7. Which of the following statements is incorrect?
a. Cytoplasm is also known as protoplasm
b. Lysosomes are known as the suicide bags of the cell
c. Mitochondria has its own DNA
d. All of the above are incorrect
e. None of the above
8. Which of the following is not a function of the vacuole in plants?
a. They store toxic metabolic wastes
b. They help with the process of cell division
c. They help to maintain turgidity
d. They provide structurally support
e. None of the above
9. Where are the essential proteins and lipids required for cell membrane, manufactured?
a. Lysosome
b. Chromosomes
c. Endoplasmic reticulum
d. Mitochondria
e. None of the above
10. The process by which water moves through a semi-permeable membrane from a region of high concentration to a region of lower concentration, thereby equalizing water concentration is called:
a. Evaporation
b. Diffusion
c. Osmosis
d. All of the above
e. None of the above
Answer Key
1 – c 6 -c
2– d 7– a
3 – b 8 – b
4– c 9– c
5– a 10– c
Question 11.
Which cell organelle plays a crucial role in detoxifring many poisons and drugs in a cell?
(a) Golgi apparatus
(b) Lysosomes
(c) Smooth endoplasmic reticulum
(d) Vacuoles
Answer : C
________________________________________
Question 12.
The proteins and lipids, essential for building the cell membrane, are manufactured by
(a) rough endoplasmic reticulum
(b) Golgi apparatus
(c) plasma membrane
(d) mitochondria
Answer : A
________________________________________
Question 13.
The undefined nuclear region of prokaryotes is also known as
(a) nucleus
(b) nucleolus
(c) nucleic acid
(d) nucleoid
Answer : D
________________________________________
Question 14.
The cell organelle involved in forming complex sugars from simple sugars are
(a) endoplasmic reticulum
(b) ribosomes
(c) plastids
(d) golgi apparatus
Answer : D
________________________________________
Question 15.
Which out of the following is not a function of vacuole?
(a) Storage
(b) Providing turgidity and rigidity to the cell
(c) Waste excretion
(d) Locomotion
Answer : D
________________________________________
Question 16.
Amoeba acquires its food through a process, termed
(a) exocytosis
(b) endocytosis
(c) plasmolysis
(d) exocytosis and endocytosis both
Answer : B
________________________________________
Question 17.
Cell wall of which one of these is not made up of cellulose?
(a) Bacteria
(b) Hydrilla
(c) Mango tree
(d) Cactus : A
Answer
________________________________________
Question 18.
Silver nitrate solution is used to study
(a) endoplasmic reticulum
(b) Golgi apparatus
(c) nucleus
(d) mitochondria
Answer : B
________________________________________
Question 19.
Organelle other than nucleus, containing DNA is
(a) endoplasmic reticulum
(b) golgi apparatus
(c) mitochondria
(d) lysosomes
Answer : C
________________________________________
Question 20.
Kitchen of the cell is
(a) mitochondria
(b) endoplasmic reticulum
(c) Chloroplast
(d) Golgi apparatus
Answer : C