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AP Biology Unit 8G: Comparative Physiology: Circulation, Respiration & Gas Exchange — practice questions

Explore 64 free Unit 8G: Comparative Physiology: Circulation, Respiration & Gas Exchange questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8G: Comparative Physiology: Circulation, Respiration & Gas Exchange questions and exercises with answers

Showing questions 1–30 of 64.

In which part of the cell does the process of glycolysis take place?Read the answer and worked solution →How many molecules of pyruvic acid are formed from the oxidation of one glucose molecule during glycolysis?Read the answer and worked solution →Which energy-rich molecule is described as the 'energy currency' of the cell?Read the answer and worked solution →Cellular respiration in which oxygen is involved is called:Read the answer and worked solution →How much energy is obtained per gram of carbohydrates?Read the answer and worked solution →Type of cell division that occurs in the somatic cells and stem cells of the body is:Read the answer and worked solution →During the electron transfer chain reaction, how many molecules of ATP are obtained from each molecule of NADH2?Read the answer and worked solution →Which substance accumulates in muscle cells when they perform anaerobic respiration during exercise, making us feel tired?Read the answer and worked solution →The two main steps through which mitosis is completed are:Read the answer and worked solution →In which phase of mitosis are all chromosomes arranged parallel to the equatorial plane of the cell?Read the answer and worked solution →In which phase of mitosis do the centromeres split so that sister chromatids separate and move to opposite poles?Read the answer and worked solution →The cyclical reactions of the tricarboxylic acid cycle take place in which cell organelle?Read the answer and worked solution →The two steps that make up anaerobic respiration are:Read the answer and worked solution →Which scientist is credited with discovering the cyclical reactions of the tricarboxylic acid cycle?Read the answer and worked solution →In an onion (a plant cell), how is cytokinesis completed at the end of cell division?Read the answer and worked solution →How much energy is obtained per gram from lipids?Read the answer and worked solution →Pyruvic acid is converted into which molecule before it enters the mitochondria for the Krebs cycle?Read the answer and worked solution →Genetic recombination (crossing over) occurs between homologous chromosomes during which process?Read the answer and worked solution →From one diploid (2n) cell, how many haploid daughter cells are produced at the end of meiosis?Read the answer and worked solution →During the conversion of pyruvic acid to acetyl-CoA, which gas is released?Read the answer and worked solution →Which set of components makes up an ATP molecule?Read the answer and worked solution →In the electron transfer chain reaction, what is the total ATP yield from two NADH2 and two FADH2 molecules together?Read the answer and worked solution →In which phase of mitosis do the nuclear membrane and nucleolus start to disappear while centrioles duplicate and move to opposite poles?Read the answer and worked solution →Which of these is NOT a function for which mitosis is essential?Read the answer and worked solution →Residual volume (RV) isRead the answer and worked solution →Surfactant in the alveoliRead the answer and worked solution →One haemoglobin molecule can carry a maximum of how many oxygen molecules?Read the answer and worked solution →Most CO₂ is transported in the blood asRead the answer and worked solution →The basic respiratory rhythm is generated in theRead the answer and worked solution →Emphysema is most commonly caused byRead the answer and worked solution →

Worked practice questions

In which part of the cell does the process of glycolysis take place?

  1. Mitochondria
  2. Nucleus
  3. Cytoplasm
  4. Ribosomes
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Correct answer: C. Cytoplasm

1. Glycolysis is the first step of cellular respiration. 2. It splits a glucose molecule step by step. 3. This process occurs in the cytoplasm, not in any organelle. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.22_

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How many molecules of pyruvic acid are formed from the oxidation of one glucose molecule during glycolysis?

  1. Four
  2. Two
  3. Six
  4. One
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Correct answer: B. Two

1. In glycolysis one glucose molecule is oxidized step by step. 2. The products formed are two molecules each of pyruvic acid, ATP, NADH2 and water. 3. So two molecules of pyruvic acid are produced. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.22_

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Which energy-rich molecule is described as the 'energy currency' of the cell?

  1. NADH2
  2. ATP
  3. FADH2
  4. Glucose
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Correct answer: B. ATP

1. ATP stores energy in the bonds attaching its phosphate groups. 2. Energy is released by breaking a phosphate bond as per need. 3. Because of this it is called the energy currency of the cell. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.23_

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More Biology topics

Unit 5C: Non-Mendelian Genetics & Population TransmissionUnit 2B: Membrane Transport, Tonicity & Cell SizeUnit 8K: Human Organ Systems & HomeostasisUnit 3B: Photosynthesis, Respiration & Cellular EnergyUnit 7B: Population Genetics & Hardy-Weinberg EvolutionUnit 2G: Osmoregulation & Membrane DynamicsUnit 8R: Environmental Pollution & Organismal HealthUnit 5D: Organismal Reproduction & Life Cycles