This quiz has a mixture of SL and HL questions

1: A child accidentally stood on a piece of sharp glass and immediately lifted their foot. The diagram shows the reflex arc for this incident:

nerve_impulse_pathway

1. Which structure labelled A to D is present in the skin of the foot?

2. Which of the following statement(s) about different types of neurons is true?

I. Sensory neurons transmit signals from receptors to the central nervous system, while motor neurons transmit signals from the central nervous system to muscles and glands.
II. Sensory neurons are found in the peripheral nervous system, while motor neurons are found in the central nervous system.
III. Interneurons relay action potentials in the peripheral and central nervous system
  • A. I only
  • B.  II only
  • C.  I and III only
  • D. I, II and III

3. The image shows a structure found in the peripheral nervous system.

 

nerve diagram

Which row of the table provides the correct labels for the diagram above?

 Laboratoires Servier
CC BY-SA 3.0
  X Y Z
A. Fascicle  Nerve Neuron
B. Neuron Axon Nerve
C. Neuron Nerve Fascicle 
D. Nerve Neuron Fascicle

4. The image below shows a diagram of the human brain.

Diagram_showing_the_brain_stem

 Cancer Research UK
CC BY-SA 4.0
Which structure labelled A to D plays a central role in coordinating involuntary muscle movements for balance and posture?

5. Which of the following applies when carbon dioxide levels increase during physical exercise?

I. Baroreceptors detect a rise in plasma acidity.
II. The respiratory depth increases to enhance the removal of carbon dioxide.
III. The respiratory centre in the brain increases the rate of diaphragm contraction.
A. II only
B. I and III only
C. II and III only
D. I, II and III
6. Which of the following is NOT considered a type of phytohormone?
  • A. Auxins
  • B. Gibberellins
  • C. Ethylene
  • D. Cytokines

7. The image shows a plant shoot exposed to light at the start of an experiment.

plant root in light
Which diagram A to D best shows what the shoot look like after a few days?

plant root in light - 4 versions
8. How do auxin efflux carriers help maintain concentration gradients of auxins within plant tissues?
  • A. They actively transport auxin out of the cell, creating a higher concentration in certain areas of a plant.
  • B. They facilitate the diffusion of auxin into the cell, increasing overall auxin levels.
  • C. They break down auxin, reducing its concentration in certain areas.
  • D. They move auxins down their concentration gradient, creating higher concentrations in certain areas of a plant.
9. How does auxin promote cell growth in plants?
  • A. By increasing the production of cellulose in the cell wall.
  • B. By increasing the cross-linking of cellulose molecules in the cell wall.
  • C. By loosening cellulose cross-links using hydrogen ions.
  • D. By stimulating the synthesis of new cell wall components

10. The image below shows two pears of the same species.

Diagram_showing_the_brain_stem

 Khruner
CC BY-SA 4.0
What has caused the difference observed between the two pears?
  • A. Ethylene and positive feedback speeding up the rate of ripening
  • B. Ethylene inhibits the production of other phytohormones necessary for ripening.
  • C. Ethylene triggers the breakdown of glycogen, causing the fruit to soften and ripen
  • D. Ethylene alters the pH of the fruit, which in turn slows down the rate of ripening