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Karnataka PUC I Plant Physiology: Respiration in Plants — practice questions

Explore 3 free Plant Physiology: Respiration in Plants questions in Karnataka PUC I Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Plant Physiology: Respiration in Plants questions and exercises with answers

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Respiration in living cells primarily produces energy by breaking downRead the answer and worked solution →The energy currency of the cell isRead the answer and worked solution →Glycolysis takes place inside theRead the answer and worked solution →

Worked practice questions

Respiration in living cells primarily produces energy by breaking down

  1. Glucose into carbon dioxide and water
  2. Proteins into amino acid building blocks
  3. Fats into glycerol and fatty acid chains
  4. Starch into hydrogen gas and oxygen
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Correct answer: A. Glucose into carbon dioxide and water

1. Section 7.1 names glucose as the main respiratory substrate. 2. Glucose breaks down to release energy stored in its bonds. 3. The end products are CO2 and water. 4. So option A is correct. _Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section 7.1_

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The energy currency of the cell is

  1. DNA, deoxyribonucleic acid
  2. ATP, adenosine triphosphate
  3. RNA, ribonucleic acid
  4. NADP, nicotinamide adenine dinucleotide phosphate
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Correct answer: B. ATP, adenosine triphosphate

1. The chapter calls ATP the energy currency of the cell. 2. ATP releases energy on conversion to ADP. 3. DNA and RNA carry information, not energy. 4. So option A is correct. _Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section 7.1 ATP_

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Glycolysis takes place inside the

  1. Nucleus next to chromatin
  2. Mitochondrial matrix only
  3. Cytoplasm of the cell
  4. Chloroplast thylakoid membrane
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Correct answer: C. Cytoplasm of the cell

1. Section 7.1 splits respiration into two phases. 2. Phase one is glycolysis, the breakdown of glucose to pyruvate. 3. It happens in the cytoplasm. 4. So option A is correct. _Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section 7.1 glycolysis_

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