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Question-1
Which of the following is correct?
(A)
Stomata are open in the day time and closed at night
(B)
Stomata are open at night and closed in the day time.
(C)
Stomata are always open
(D)
Stomata are always closed
Question-2
Small green structures present in the cytoplasm of the leaf cells.
(A)
Chlorophyll
(B)
Chloroplast
(C)
Chemoplast
(D)
Mitochondria
Question-3
After photosynthesis, hundreds of glucose molecules join together to from a long chain of molecule of X. What is X?
(A)
Amino acids
(B)
Cellulose
(C)
Starch
(D)
Vitamins
Question-4
The oxygen molecule in glucose formed during photosynthesis comes from:
(A)
Water
(B)
Organic acids
(C)
CO
2
(D)
Atmosphere
Question-5
Photosynthesis can be summarised by which word equation?
(A)
Carbon dioxide + oxygen → glucose + water
(B)
Oxygen + glucose → carbon dioxide + water
(C)
Carbon dioxide + water → glucose + oxygen
(D)
Carbon dioxide + glucose → Oxygen + water
Question-6
What is a trace element?
(A)
An element which can be traced by Geiger counter
(B)
An element which was first discovered in a cell
(C)
An element which is required by plants in minute quantities
(D)
An element which draws other elements out of protoplasm
Question-7
Why do plants need nitrate ions?
(A)
To make fatty acids
(B)
To make proteins
(C)
To make starch for storage
(D)
To make glucose
Question-8
Where are more chloroplast present?
(A)
In the spongy cells
(B)
In the middle
(C)
In the palisade cells
(D)
Both in palisade and mesophyll cells
Question-9
A plant is showing discoloured and mottled leaves. This may be due to the deficiency of which of the following salts?
(A)
Nitrates
(B)
Phosphates
(C)
Potassium
(D)
Sodium
Question-10
The small pores present on the surface of the leaves.
(A)
Stomata
(B)
Chlorophyll
(C)
Chloroplast
(D)
Mitochondria
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Cambridge Secondary Grade 9
IGCSE
Practice in Related Chapters
The Interdependence of Living Organisms
Feeding
Keeping Healthy
Transport in Plants
Classification
Cells and Tissues
Movement in and out of Cells
Personal Health
Animal Nutrition
Reproduction
Sensitivity
Cells the Building Blocks
Genetics
The Skeleton, Muscles and Movement
A Sexual Reproduction and Cloning Plants
The Senses
Survival
Co-ordination
Energy for Respiration
The Chemicals of Living Cells
How Substances Get In and Out of Cells
Plants for Food
Photosynthesis and Nutrition in Plants
Plant Structure and Function
Food and Diet
The Human Impact on the Environment
Digestion, Absorption and Use of Food
The Blood Circulatory System
Breathing
Excretion and the Kidneys
Human Reproduction
Classification
Conservation
Micro Organisms
Reproduction in Flowering Plants
Movement and Locomotion
Growth and Development
Disease: causes, transmission and control
Ecosystems
Population
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