Leaves & Photosynthesis — Homi Bhabha Class 6 Biology MCQs with Solutions
Free Homi Bhabha Class 6 Biology Leaves & Photosynthesis MCQs with step-by-step solutions (8 questions). Part of Plant Anatomy & Functions. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Leaves & Photosynthesis · easy · theory
In which part of a green plant does most of the food-making (photosynthesis) take place?
A. Leaves ✓ Correct
B. Roots
C. Bark
D. Flowers
Solution: Leaves are flat and green and catch plenty of sunlight, so they are the main part where the plant makes its food.
Q2 — Leaves & Photosynthesis · easy · theory
What is the green colouring matter in leaves that helps them make food called?
A. Nectar
B. Starch
C. Chloroform
D. Chlorophyll ✓ Correct
Solution: The green colour of leaves comes from chlorophyll, which traps sunlight energy needed to make food.
Q3 — Leaves & Photosynthesis · easy · theory
Which gas do leaves take in from the air to make their food?
A. Oxygen (O₂)
B. Carbon dioxide (CO₂) ✓ Correct
C. Nitrogen
D. Hydrogen
Solution: Plants use carbon dioxide (CO₂) from the air, along with water and sunlight, to make food during photosynthesis.
Q4 — Leaves & Photosynthesis · medium · theory
While making food in sunlight, green plants give out a gas that we need for breathing. Which gas is it?
A. Carbon dioxide (CO₂)
B. Nitrogen
C. Oxygen (O₂) ✓ Correct
D. Smoke
Solution: During photosynthesis plants release oxygen (O₂), the gas that humans and animals need to breathe.
Q5 — Leaves & Photosynthesis · medium · theory
The tiny pores on the surface of a leaf through which gases go in and out are called …
A. Veins
B. Petals
C. Roots
D. Stomata ✓ Correct
Solution: Stomata are the small openings on a leaf that let carbon dioxide in and oxygen out during food-making.
Q6 — Leaves & Photosynthesis · medium · theory
The food that a leaf makes during photosynthesis is mostly stored in the form of …
A. Sand
B. Water
C. Starch ✓ Correct
D. Salt
Solution: The sugar made by the leaf is stored as starch. That is why iodine turns a food-making leaf blue-black in tests.
Q7 — Leaves & Photosynthesis · hard · theory
Green plants can make their own food but animals cannot. The main reason is that plants have …
A. Chlorophyll to trap sunlight ✓ Correct
B. More water inside them
C. Bigger bodies
D. No need for food
Solution: Only plants have chlorophyll, which captures sunlight to make food. Animals have no chlorophyll, so they must eat plants or other animals.
Q8 — Leaves & Photosynthesis · hard · theory
A healthy green plant is kept inside a completely dark cupboard for many days. What is most likely to happen?
A. It gives out more oxygen
B. It makes much more food
C. It grows greener and stronger
D. It cannot make food and becomes pale and weak ✓ Correct
Solution: Without sunlight the plant cannot carry out photosynthesis, so it makes no food and slowly turns pale and weak.