Science Class 6th
121. During photosynthesis plants give out?
A. CO2
B. O2
C. H2O
D. None of these
122. The remaining glucose in plant is converted into?
A. Glycogen
B. Food
C. Starch
D. None of these
123. Starch is converted back into when needed by plants.
A. Oxygen
B. Food
C. Water
D. Glucose
124._____ are especially adapted for the photosynthesis.
A. Leaves
B. Stems
C. Fruits
D. All of these
125. Leaves are_____ so that CO2 could reach easily to the inner cells.
A. Thick
B. Thin
C.Narrow
D. None of these
126. Carbon dioxide enters to the leaves through?
A. Leaves
B. Epidermis
C. Stomata
D. Roots
127. Low light intensity _____ down the process of photosynthesis.
A. Accelerate
B. Slows down
C. None of these
128.In _____ photosynthesis doesn’t take place.
A. Dark
B. Day
C. Rain
D. None of these
129. Concentration of CO2 in air is?
A. 4%-5%
B. 6%-10%
C. 4% to 10%
D. 0.03%-0.04%
130. A sharp increase of decrease in the level of Carbon Dioxide_____ down photosynthesis.
A. Accelerate
B. Slows down
C. Stop
D. Increase
131. Suitable temperature for photosynthesis is?
A. 25 C to 35 C
B. 40 to 42
C. 50C to 60C
D. None of these
132. Sun light is absorbed by?
A. Stomata
B. Green plant
C. Chlorophyll
D. None of these
133. The process by which energy is released from food is called?
A. Photosynthesis
B. Break down
C. Respiration
D. All of these
134. The products of Respiration are?
A. Water
B. Carbon dioxide
C. Energy
D. All of the above
135. Raw materials of Respiration are?
A. Glucose
B. Oxygen
C. Both ‘a’ and ‘b’
D. None of these
136. The process of respiration takes place ?
A. Night
B. Day
C. All the time
D. None of these
137. Process of Photosynthesis take place at?
A. Night
B. Day
C. All the time
D. None of these
138. Energy is released in?
A. Respiration
B. Photosynthesis
C. Both ‘a’ and ‘b’
D. None of these
139. Energy is required in?
A. Respiration
B. Photosynthesis
C. Both ‘a’ and ‘b’
D. None of these
140. Glucose is broken in?
A. Photosynthesis
B. Respiration
C. None of these