Well structured WBBSE Class 9 Life Science MCQ Questions Chapter 1.1 Basic Properties of Life can serve as a valuable review tool before exams.
Basic Properties of Life Class 9 WBBSE MCQ Questions
Multiple Choice Questions & Answers
Question 1.
One of the basic properties of a living organism is- …………………….
A. To intake oxygen
B. To move
C. To reproduce
D. To absorb water
Answer:
A. To intake oxygen
Question 2.
All reactions of life take place within the- …………………….
A. Nucleus
B. Mitochondrion
C. Chromosome
D. Protoplasm
Answer:
D. Protoplasm
Question 3.
All the biochemical processes occurring within a living organism in order to sustain life, are collectively known as- …………………….
A. Energy
B. Metabolism
C. Nutrition
D. Digestion
Answer:
B. Metabolism
Question 4.
The concept of spontaneous generation of life was first proposed by- …………………….
A. Haldane and Oparin
B. Aristotle
C. Urey and Miller
D. Melvin Calvin
Answer:
B. Aristotle
Question 5.
The concept of origin of life from inorganic matter is known as-…………………….
A. Special creation
B. Chemosynthesis
C. Biogenetic concept
D. Pangenesis
Answer:
B. Chemosynthesis
Question 6.
The first step of chemical origin of life was the-…………………….
A. Origin of coacervates
B. Origin of complex organic compounds
C. Origin of simple organic compounds
D. Origin of proteinoids
Answer:
C. Origin of simple organic compounds
Question 7.
The essential gaseous ingredient of present atmosphere, which was absent in the primitive atmosphere before the origin of life, is-…………………….
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Carbon monoxide
Answer:
C. Oxygen
Question 8.
The concept of chemosynthesis of life on earth was proposed by-…………………….
A. Aristotie
B. Miller and Urey
C. Oparin and Haldane
D. Sidney Fox
Answer:
C. Oparin and Haldane
Question 9.
According to Cosmozoic theory or Panspermia, the reason of origin of life is-…………………….
A. Extraterrestrial objects, such as comet
B. Biochemical reactions
C. Spontaneous creation
D. None of these
Answer:
A. Extraterrestrial objects, such as comet
Question 10.
The simple compound present in the primitive earth, was-…………………….
A. H2O
B. NH3
C. CH4
D. All of these
Answer:
D. All of these
Question 11.
The simple organic matter produced from the inorganic compounds during chemosynthesis of life was-…….
A. Fatty acids
B. Amino acids
C. Both A& B.
D. None of these
Answer:
C. Both A& B.
Question 12.
Coacervate, as proposed by Oparin, was mainly composed of-…………………….
A. Lipids
B. Proteins
C. Carbohydrates
D. All of these
Answer:
A. Lipids
Question 13.
‘Hot dilute soup’ produced in the primitive ocean contained-…………………….
A. Amino acids and fatty acids
B. Purines and pyrimidines
C. Simple sugars
D. All of these
Answer:
D. All of these
Question 14.
Formation of proteinoids, before the origin of primordial cell, was explained by-…………………….
A. A I Oparin
B. J B S Haldane
C. Stanley Miller
D. Sidney Fox
Answer:
D. Sidney Fox
Question 15.
The term ‘biodiversity’ was coined by-…………………….
A. Norman Myers
B. Alexander Oparin
C. Gaylord Nelson
D. W G Rosen
Answer:
D. W G Rosen
Question 16.
In the laboratory experiment of chemosynthesis of organic matters from simple inorganic compounds, Urey and Miller used-…………………….
A. NH3 ,CH4 ,H2O
B. H2O, NH3,CH4, H2
C. NH3, CH4, H2O, O2
D. All of these
Answer:
B. H2O, NH3,CH4, H2
Question 17.
The energy required for the chemical reactions, which occur during chemosynthesis of life, was obtained from-…………………….
A. Extreme heat of the primitive earth
B. Cosmic rays
C. Lightning
D. All of these
Answer:
D. All of these
Question 18.
In primitive ocean, proteinoids were formed by polymerisation of-…………………….
A. Sugar molecules
B. Fatty acids
C. Nucleic acids
D. Protein molecules
Answer:
D. Protein molecules
Question 19.
The basic physical component of life is-…………………….
A. Nucleic acid
B. Glycerol
C. Glucose
D. Nucleoside
Answer:
A. Nucleic acid
Question 20.
Protobionts are-…………………….
A. A cluster of microsphere molecules, surrounded by a membrane
B. A cluster of protein molecules, surrounded by a lipid layer
C. A cluster of proteinoids, covered with a limiting membrane
D. Nothing but protocells
Answer:
D. Nothing but protocells
Question 21.
The first phase of chemical reactions during chemosynthesis of organic matters started in-…………………….
A. Atmosphere
B. Primitive ocean
C. Earth’s surface
D. Beneath earth’s crust
Answer:
A. Atmosphere
Question 22.
During origin of life, the atmosphere of earth was-…………………….
A. Oxidising
B. Reducing
C. Partially oxidised and partially reduced
D. None of these
Answer:
B. Reducing
Question 23.
The ‘Cyanogen hypothesis’ was given by-…………………….
A. Pfluger
B. Daniken
C. Miller
D. Arrhenius
Answer:
A. Pfluger
Question 24.
Origin of life on the earth was manifested by the formation of-…………………….
A. Microspheres
B. Proteinoids
C. Nucleic acids
D. Protobionts
Answer:
D. Protobionts
Question 25.
Life on the earth originated about-…………………….
A. 2.5 billion years back
B. 4.4 billion years back
C. 3.7 million years back
D. 4.5 million years back
Answer:
B. 4.4 billion years back
Question 26.
The main role played by the organisms in transforming the de-oxidised atmosphere of the primitive earth into an oxidising one, are-…………………….
A. Green plants
B. Photosynthetic bacteria
C. Algae
D. Cyanobacteria
Answer:
D. Cyanobacteria
Question 27.
According to Sidney Fox, prior to the origin of life, numerous thin membrane-bound proteinoid-clusters were termed as-…………………….
A. Coacervates
B. Microspheres
C. Protocells
D. Protobionts
Answer:
B. Microspheres
Question 28.
The relentless effort of a living organism to adjust itself with the changing environment, is called-…………………….
A. Adaptation
B. Migration
C. Evolution
D. Natural selection
Answer:
A. Adaptation
Question 29.
Mutation in organisms occurs-…………………….
A. Slow and steadily
B. With the change in nature
C. Suddenly and temporarily
D. Suddenly and permanently
Answer:
D. Suddenly and permanently
Question 30.
The assumed temperature of the earth during its origin was about-…………………….
A. 2000°-3000°C
B. 3000°-4000°C
C. 400°-500°C
D. 5000°-6000°C
Answer:
D. 5000°-6000°C
Question 31.
The ‘Ancient Astronauts’ hypothesis of origin of life was proposed by scientist-…………………….
A. Pfluger
B. Pasteur
C. Urey
D. Daniken
Answer:
D. Daniken
Question 32.
The physical basis of life is-…………………….
A. Cell
B. Endoplasm
C. Protoplasm
D. Cytoplasm
Answer:
C. Protoplasm
Question 33.
‘Naked gene’ is not covered by-…………………….
A. Plasma membrane
B. Lipid membrane
C. Peptidoglycan membrane
D. Nuclear membrane
Answer:
D. Nuclear membrane
Fill in the blanks:
1. The first nucleic acid which originated on earth was …………….
Answer: RNA
2. The country with the richest biodiversity on earth, is …………….
Answer: Brazil
3. Eye colour is an example of ……………. variation.
Answer: Discontinuous
4. The earliest photosynthetic living organism on this earth was …………….
Answer: Cyanobacteria
5. The concept of spontaneous generation of life was rejected by …………….
Answer: Pasteur
6. ……………. and nucleic acid combined together to form life on primitive earth.
Answer: Protein
7. ……………. is responsible for discontinuous variation.
Answer: Mutation
8. Proteinoid molecules conjugate to form …………….
Answer: Microspheres
State True or False
1. Adaptability is the ability of a living organism to adjust with the changing environment. — True
2. Biogenesis is a synonym of biopoiesis. — False
3. Scientist Haldane coined the term ‘primordial soup’. — False
4. Hydrogen was the predominant gas in the primitive atmosphere. — True
5. Mimosa pudica respond to stimulus. — True
6. Alpha diversity is called turnover diversity. — False
Match the columns
| Left column | Right column |
| 1. Biochemical theory of life | A. Aristotle |
| 2. Microsphere | B. Oparin |
| 3. Spontaneous generation | C. Haldane |
| 4. Hot dilute soup | D. Stanley Miller |
| E. Sidney fox |
Answer:
1-B; 2-E; 3-A; 4-C
| Left column | Right column |
| 1. Human weight | A. Beta diversity |
| 2. Species richness in an area | B. Discontinuous variation |
| 3. Turnover diversity | C. Gamma diversity |
| 4. Human eye colour | D. Alpha diversity |
| E. Continuous variation |
Answer:
1-E; 2-D; 3-A; 4-B