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AP Biology Unit 8K: Human Organ Systems & Homeostasis — practice questions — page 2

Explore 92 free Unit 8K: Human Organ Systems & Homeostasis questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8K: Human Organ Systems & Homeostasis questions and exercises with answers

Showing questions 31–60 of 92.

Photosynthesis converts light energy intoRead the answer and worked solution →The overall reaction of photosynthesis isRead the answer and worked solution →Which pigment is essential for photosynthesis?Read the answer and worked solution →Which gas is released as a by-product of photosynthesis?Read the answer and worked solution →Photosynthesis takes place mainly in which organelle?Read the answer and worked solution →Which colour of light is absorbed least by chlorophyll?Read the answer and worked solution →The light reaction of photosynthesis happens in theRead the answer and worked solution →Which factor below is a limiting factor for photosynthesis?Read the answer and worked solution →After destarching, a partly-covered leaf in sunlight tested with iodine showsRead the answer and worked solution →Which part of the chloroplast carries out the dark reaction (Calvin cycle)?Read the answer and worked solution →Water is split during theRead the answer and worked solution →Which two molecules link the light reaction to the dark reaction?Read the answer and worked solution →Beyond the saturation point of light intensity, photosynthesisRead the answer and worked solution →Why is photosynthesis the basis of food chains?Read the answer and worked solution →An aquatic plant in bright light produces visible bubbles. This provesRead the answer and worked solution →In the Calvin cycle the immediate carbon-acceptor isRead the answer and worked solution →Besides light and CO2, what factor can slow photosynthesis if too low?Read the answer and worked solution →Iodine is used in the starch test because in presence of starch itRead the answer and worked solution →A variegated leaf shows starch only in the green parts becauseRead the answer and worked solution →Blood is classified as which kind of tissue?Read the answer and worked solution →An average adult human has approximatelyRead the answer and worked solution →The pH of human blood lies betweenRead the answer and worked solution →Blood circulates through closed vessels in humans. This system is calledRead the answer and worked solution →Which formed elements of blood help in clotting?Read the answer and worked solution →The protein in RBC that carries oxygen isRead the answer and worked solution →Tissue fluid forms when blood plasmaRead the answer and worked solution →Which type of blood vessel carries oxygen-rich blood away from the heart?Read the answer and worked solution →The ABO blood group system depends on which feature of blood?Read the answer and worked solution →During systoleRead the answer and worked solution →Double circulation in mammals means that blood passes through the heartRead the answer and worked solution →

Worked practice questions

Photosynthesis converts light energy into

  1. Chemical energy stored in glucose
  2. Heat energy that warms the leaf
  3. Sound energy that travels in air
  4. Electrical energy used directly in cells
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Correct answer: A. Chemical energy stored in glucose

1. Photosynthesis uses sunlight as the energy source. 2. Chlorophyll captures the photons. 3. The energy is stored in chemical bonds of glucose. 4. So light energy becomes chemical energy. _Source: Selina Concise Biology Class 10, Ch on Photosynthesis (Mistral OCR'd PDF), section on overall reaction_

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The overall reaction of photosynthesis is

  1. 6 O2 + 6 H2O -> C6H12O6 + 6 CO2 by sunlight
  2. 6 CO2 + 6 H2O -> C6H12O6 + 6 O2
  3. C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O by respiration
  4. C6H12O6 -> 6 CO2 + 6 H2 by another reaction
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Correct answer: B. 6 CO2 + 6 H2O -> C6H12O6 + 6 O2

1. Reactants are CO2 and water, with sunlight as energy. 2. Products are glucose (C6H12O6) and oxygen. 3. Balanced form: 6 CO2 + 6 H2O -> C6H12O6 + 6 O2. 4. So option A is correct. _Source: Selina Concise Biology Class 10, Ch on Photosynthesis (Mistral OCR'd PDF), section on equation_

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Which pigment is essential for photosynthesis?

  1. Melanin found in skin cells
  2. Haemoglobin found in red blood cells
  3. Chlorophyll located in chloroplasts
  4. Cytochrome found in mitochondria
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Correct answer: C. Chlorophyll located in chloroplasts

1. Photosynthesis needs a pigment to absorb sunlight. 2. The chapter names chlorophyll as that pigment. 3. It absorbs red and blue strongly, reflects green. 4. So chlorophyll is the key pigment. _Source: Selina Concise Biology Class 10, Ch on Photosynthesis (Mistral OCR'd PDF), section on pigments_

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More Biology topics

Unit 5C: Non-Mendelian Genetics & Population TransmissionUnit 2B: Membrane Transport, Tonicity & Cell SizeUnit 3B: Photosynthesis, Respiration & Cellular EnergyUnit 7B: Population Genetics & Hardy-Weinberg EvolutionUnit 2G: Osmoregulation & Membrane DynamicsUnit 8R: Environmental Pollution & Organismal HealthUnit 5D: Organismal Reproduction & Life CyclesUnit 6B: Transcription, Translation & Gene Expression