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18 questions · timed · auto-graded

Question 11 Mark
Arrange and Rewrite :
Snake, Rabbit, Cabbage, Hawk.
Answer
Cabbage, Rabbit, Snake, Hawk.
Explanation:
Logical sequence: Food chain from producer to top predator. Firstly, the Cabbage is moved as it poses no threat. Next, the Rabbit is transported to prevent it from eating the cabbage or being eaten by the snake. The Snake is moved afterwards, ensuring it doesn't endanger the rabbit or fall prey to the hawk. Finally, the Hawk is transported as the top predator, completing the sequence. Each step is crucial to maintain the balance and ensure no one eats the other during the transportation process.
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Question 21 Mark
Choose the Odd One Out :
Light intensity, Water content, Temperature, Chlorophyll.
Answer
Odd : Chlorophyll Category : External factor affecting photosynthesis
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Question 31 Mark
Choose the Odd One Out :
Glucose, Water, Oxygen, Carbon dioxide.
Answer
Odd : Carbon dioxide Category : Products of photosynthesis
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Question 51 Mark
Arrange and Rewrite :
Carbon fixation, Glucose formation, Conversion of light energy into chemical energy, Absorption of light by chlorophyll, ATP, and NADPH usage
Answer
Absorption of light by chlorophyll, Conversion of light energy into chemical energy, ATP and NADPH usage, Carbon fixation, Glucose formation
Explanation:
The process starts with the absorption of light by chlorophyll, converting light energy into chemical energy (ATP and NADPH). These energy molecules are then used in the Calvin cycle for carbon fixation, eventually leading to the formation of glucose.
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Question 61 Mark
Arrange and Rewrite :
Water influx, Potassium ions move into guard cells, Stomata open, Guard cells swell, Glucose is converted to malate
Answer
Potassium ions move into guard cells, Glucose is converted to malate, Water influx, Guard cells swell, Stomata open
Explanation:
The process begins with Potassium Ions Moving into Guard Cells, creating an osmotic gradient, while glucose converts to malate to maintain osmotic balance. This causes water influx, making the guard cells swell and change shape. Consequently, this swelling opens the stomata, enabling essential gas exchange for photosynthesis.
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Question 71 Mark
Arrange and Rewrite :
Testing a leaf for starch, Placing the plant in light, covering a portion of a leaf, Destarching a plant, Boiling the leaf in alcohol
Answer
Destarching a Plant, covering a Portion of a Leaf, Placing the Plant in Light, Boiling the Leaf in Alcohol, Testing a Leaf for Starch
Explanation:
The procedure starts with Destarching a Plant to eliminate existing starch. Then, part of a leaf is Covered to serve as a control. After Placing the Plant in Light, photosynthesis occurs in the uncovered areas. Boiling the Leaf in Alcohol removes chlorophyll for clarity. Lastly, Testing for Starch with iodine indicates photosynthesis by a colour change in the exposed areas of the leaf.
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Question 81 Mark
Arrange and Rewrite :
Hydrogen release by NADP, Formation of Glucose,$CO _2$ Absorption,Combination of Hydrogen and $CO _2$
Answer
$CO _2$ Absorption, Hydrogen release by NADP, Combination of Hydrogen and $CO _2$, Formation of Glucose
Explanation:
In the dark phase, CO 2 is absorbed first, followed by the release of hydrogen by NADP. These elements combine to form glucose, a process not requiring light, hence termed 'dark reaction'.
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Question 91 Mark
Arrange and Rewrite :
Oxygen release, Electron transport chain, ATP synthesis, Light absorption, Water splitting
Answer
Light Absorption, Water Splitting, Electron Transport Chain, ATP Synthesis, Oxygen Release
Explanation:
The sequence begins with Light Absorption, where Photosystem pigments absorb light, initiating water splitting into oxygen, hydrogen ions, and electrons. These electrons traverse the thylakoid membrane's electron transport chain, creating a proton gradient that drives ATP synthesis for cellular energy. Finally, oxygen is released, concluding the light-dependent phase of photosynthesis.
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Question 101 Mark
Arrange and Rewrite :
Granum, Stroma, Thylakoid membrane, Chlorophyll molecules, Photosystems
Answer
Thylakoid Membrane, Chlorophyll Molecules, Photosystems, Granum, Stroma
Explanation:
The Thylakoid Membrane in chloroplasts, embedded with key pigments like chlorophyll, initiates photosynthesis. These pigments form Photosystems I and II, which are vital for light-dependent reactions. Thylakoid membranes stack to form a Granum, improving light capture efficiency. The Stroma surrounds the thylakoids and contains enzymes for the Calvin cycle.
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Do as Directed. - Biology STD 10 Questions - Vidyadip