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WorksheetsTFQ-CBSE-10-S-C5-T2.1-Pre
Total questions: 14
Worksheet time: 7mins
CBSE - 2025 - MCQ - 1 Mark
The essential element taken up from the soil by the plants to synthesize proteins is
phosphorus
nitrogen
iron
magnesium.
CBSE - 2024 - MCQ - 1 Mark
A stomata closes when:
it needs carbon dioxide for photosynthesis.
it does not need carbon dioxide for photosynthesis.
water flows out of the guard cells.
water flows into the guard cells.
CBSE - 2023 - MCQ - 1 Mark
One of the events that does not occur during photosynthesis is
chlorophyll absorbs solar energy
carbon dioxide is released during the process
oxygen is released during the process
carbon dioxide is absorbed during the process.
CBSE - 2023 - MCQ - 1 Mark
Water in the root enters due to:
the function of the root to absorb water
difference in the concentration of ions between the root and the soil
excess water present in the soil
diffusion of water in the roots.
CBSE - 2022 - MCQ - 1 Mark
In the flow chart showing autotrophic nutrition in green plants, A and B respectively are
oxygen and energy
starch and oxygen
energy and starch
oxygen and water
CBSE - 2024 - VSA - 1 Mark
The raw materials required for photosynthesis are:
Carbon dioxide and water
Oxygen and glucose
Nitrogen and water
Carbon monoxide and oxygen
he correct statements with reference to single celled organisms are: (i) complex substances are not broken down into simpler substances (ii) simple diffusion is sufficient to meet the requirement of exchange of gases (iii) specialized tissues perform different functions in the organism (iv) entire surface of the organism is in contact with the environment for taking in food.
(i) and (iii)
(ii) and (iii)
(ii) and (iv)
(i) and (iv)
Which one of the following conditions is true for the state of stomata of a green leaf shown in the given diagram?
Large amount of water flows into the guard cells.
Gaseous exchange is occurring in large amount.
Large amount of water flows out from the guard cells.
Large amount of sugar collects in the guard cells.
Assertion (A): Nitrogen is an essential element for plant growth and is taken up by plants in the form of inorganic nitrates or nitrites. Reason (R): The soil is the nearest and richest source of raw materials like nitrogen, phosphorus and other minerals for the plants.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
A student was asked to write a stepwise procedure to demonstrate that carbon dioxide is necessary for photosynthesis. He wrote the following steps. The wrongly worded step is:
both potted plants are kept in dark room for at least three days
bottom of the bell jars is sealed to make them air tight
both potted plants are kept in sunlight after the starch test
a leaf from both the plants is taken to test the presence of starch.
The process by which plants prepare food is called ________ and is defined as the process by which green plants use sunlight to synthesize food from carbon dioxide and water.
photosynthesis
respiration
transpiration
germination
The rate at which green plants prepare food decreases during cloudy weather and when stomata get blocked due to dust because:
Less sunlight and blocked stomata reduce photosynthesis.
More sunlight and open stomata increase photosynthesis.
Cloudy weather increases photosynthesis, but blocked stomata have no effect.
Blocked stomata increase photosynthesis, but cloudy weather has no effect.
State in proper sequence the events that occur in synthesis of food by desert plants.
Absorption of carbon dioxide, absorption of water, photosynthesis using sunlight, formation of glucose
Absorption of water, release of oxygen, absorption of carbon dioxide, formation of glucose
Release of oxygen, absorption of sunlight, absorption of water, formation of glucose
Absorption of sunlight, release of carbon dioxide, absorption of water, formation of glucose
Which of the following is the correct chemical equation involved in the process of photosynthesis ?
6 CO2 + 4 H2O → C6H12O4
6 CO2 + 6 H2O → C6H12O6 + 6 O2
6O2 + 6 H2O → C6H12O6 + 6 CO2
6 CO2 + H2O → C6H8O6 + 6 O2
