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Who proposed the fluid mosaic model of plasma membrane?
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Which of the following statements is not true for plasma membrane?
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The stain used to visualise motochondria is ______.
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The primary structure of a protein molecule has ______.
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Schematically represent primary, secondary and tertiary structures of a hypothetical polymer say for example a protein.
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Given below is a table. Fill in the gaps
| Property | Simple diffusion | Facilitated transport | Active Transport |
| i Highly selective | ______ | Yes | ______ |
| ii Uphill transport | ______ | ______ | Yes |
| iii Requires ATP | ______ | ______ | ______ |
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Identify a type of molecular movement which is highly selective and requires special membrane proteins, but does not require energy.
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Various types of transport mechanisms are needed to fulfil the mineral requirements of a plant. Why are they not fulfilled by diffusion alone?
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Which one of the following symptoms is not due to manganese toxicity in plants?
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A farmer adds/ supplies Na, Ca, Mg and Fe regularly to his field and yet he observes that the plants show deficiency of Ca, Mg and Fe. Give a valid reason and suggest a way to help the farmer improve the growth of plants.
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We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/If no, why?
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Chemosynthetic bacteria obtain energy from ______.
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Complete the flow chart for cyclic photophosphorylation of the photosystem-I
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Why do we believe chloroplast and mitochondria to be semi-autonomous organelle?
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In the diagram given below what is label A, B and C. What type of phosphorylation is possible in this?
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Do you know any step in the TCA cycle where there is substrate level phosphorylation. Which one?
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A rubber band stretches and reverts back to its original position. Bubble gum stretches, but it would not return to its original position. Is there any difference between the two processes? Discuss it with respect to plant growth (Hint: Elasticity (reversible) Plasticity (irreversible))
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Match the enzyme with their respective substrate and choose the right one among options given
| Column I | Column II |
| A. Lipase | i. Carbohydrates |
| B. Nuclease | ii. Fats |
| C. Carboxypeptidase | iii. Nucleic acids |
| D. Glycoridases | iv. Proteins, peptones and proteoses |
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Correct the following statement by deleting one of entries (given in bold).
Gastric glands of stomach mucosa have oxyntic cell/chief cells which secrete HCl.
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What are three major types of cells found in the gastric glands? Name their secretions.
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