MCQs / Biology / A Level Biology: Transport in mammals

A Level Biology: Transport in mammals MCQs — Biology (page 2)

31 multiple-choice questions on A Level Biology: Transport in mammals from Biology, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.

26. In respiring tissues, the steep part of the curve means

  1. haemoglobin cannot release oxygen
  2. CO₂ is released
  3. a small fall in pO₂ releases a large amount of oxygen
  4. haemoglobin is always saturated

Answer: C) a small fall in pO₂ releases a large amount of oxygen

Explanation: Unloading is efficient. AS & A Level Biology · Topic 8 Transport in Mammals · 8.2 Transport of oxygen and carbon dioxide

Discuss this question

27. A lymphocyte can be recognised by

  1. a lobed nucleus
  2. a bean-shaped nucleus
  3. having no nucleus
  4. a large round nucleus filling most of the cell

Answer: D) a large round nucleus filling most of the cell

Explanation: Lymphocytes have little cytoplasm. AS & A Level Biology · Topic 8 Transport in Mammals · 8.1 The circulatory system

Discuss this question

28. Carbaminohaemoglobin forms when CO₂ binds to

  1. water
  2. chloride ions
  3. amine groups of haemoglobin
  4. the iron ion

Answer: C) amine groups of haemoglobin

Explanation: CO₂ binds to amino groups of the globin. AS & A Level Biology · Topic 8 Transport in Mammals · 8.2 Transport of oxygen and carbon dioxide

Discuss this question

29. A white blood cell with a multi-lobed nucleus is a

  1. lymphocyte
  2. neutrophil
  3. red blood cell
  4. monocyte

Answer: B) neutrophil

Explanation: Neutrophils have lobed nuclei. AS & A Level Biology · Topic 8 Transport in Mammals · 8.1 The circulatory system

Discuss this question

30. During ventricular systole,

  1. AV valves close and semilunar valves open
  2. AV valves open and semilunar valves close
  3. all valves close
  4. all valves open

Answer: A) AV valves close and semilunar valves open

Explanation: Pressure closes AV valves and opens semilunar valves. AS & A Level Biology · Topic 8 Transport in Mammals · 8.3 The heart

Discuss this question

31. Cardiac muscle is described as myogenic because

  1. it contracts without needing nerve impulses
  2. it contains no mitochondria
  3. it never tires
  4. it is controlled by the brain only

Answer: A) it contracts without needing nerve impulses

Explanation: The heartbeat starts within the muscle. AS & A Level Biology · Topic 8 Transport in Mammals · 8.3 The heart

Discuss this question

Previous Page 2 of 2

Practise A Level Biology: Transport in mammals MCQs

More Biology chapters