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Many elements are found in living organisms either free or in the form of compounds. Which of the following is not found in living organisms?
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Aminoacids, have both an amino group and a carboxyl group in their structure. Which one of the following is an amino acid?
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An aminoacid under certain conditions have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is called ______.
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Write the name of anyone aminoacid, sugar, nucleotide and fatty acid.
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Glycine and Alanine are different with respect to one substituent on the α-carbon. What are the other common substituent groups?
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What is the difference between a nucleotide and nucleoside? Give two examples of each with their structure.
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Describe various forms of lipid with a few examples.
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When a plant undergoes senescence, the nutrients may be ______.
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Match the following and choose the correct option
| Column I | Column II |
| A. Leaves | i. Anti-transpirant |
| B. Seed | ii. Transpiration |
| C. Roots | iii. Negative osmotic potential |
| D. Aspirin | iv. Imbibition |
| E. Plasmolyzed cell | v. Absorption |
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A flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster, but after some time the plant dies. This may be due to ______.
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Mitochondria are called powerhouses of the cell. Which of the following observations support this statement?
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Explain the term “Energy Currency”. Which substance acts as energy currency in plants and animals?
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If a person is feeling dizzy, glucose or fruit juice is given immediately but not a cheese sandwich Explain.
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When a substrate is being metabolized, why does not all the energy that released in one step. It is released in multiple steps.What is the advantage of step-wise release?
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Respiration requires O2. How did the first cells on the earth manage to survive in an atmosphere that lacked O2?
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It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?
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RuBP carboxylase, PEP carboxylase, Pyruvate dehydrogenase, ATPase, cytochrome oxidase, Hexokinase, Lactate dehydrogenase.
Select/choose enzymes from the list above which are involved in
- Photosynthesis
- Respiration
- Both in photosynthesis and respiration
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How does a tree trunk exchange gases with the environment although it lacks stomata?
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Plasticity in plant growth means that ______.
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Which of the following is not true of intestinal villi?
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