Question 1

Which of the following best describes the main purpose of the 'Working Scientifically' skills in the Stage 6 Biology syllabus?

Accepted Answer

To develop and apply dynamic, interdependent processes for scientific investigation and problem-solving.

Question 2

A student is designing an experiment to test the effect of light intensity on the rate of photosynthesis in Elodea plants. Which variable should be kept constant to ensure a valid investigation?

Accepted Answer

The type of plant used in each trial.

Question 3

Which of the following is an example of a secondary-sourced investigation in biology?

Accepted Answer

Extracting and reorganising data from published scientific articles to create a graph of disease incidence.

Question 4

Which equation correctly represents the process of aerobic cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + Energy}$$

Question 5

A population of insects is exposed to a new pesticide. After several generations, most insects are resistant to the pesticide. Which concept best explains this observation?

Accepted Answer

Natural selection

Question 6

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus; prokaryotic cells do not.

Question 7

Which of the following is a structural adaptation that helps desert plants conserve water?

Accepted Answer

Thick, waxy cuticle on leaves to reduce water loss.

Question 8

Which of the following best explains why biodiversity is important for ecosystem stability?

Accepted Answer

It increases the likelihood that some species can adapt to environmental changes.

Question 9

A student collects data on the prevalence of a non-infectious disease in a population over ten years. Which type of study is this an example of?

Accepted Answer

Epidemiological study

Question 10

Which of the following is a correct statement about the role of enzymes in biological systems?

Accepted Answer

Enzymes lower the activation energy required for chemical reactions.

Question 11

Which of the following best describes the function of the cell membrane according to the fluid mosaic model?

Accepted Answer

It is a flexible, dynamic structure that controls the movement of substances into and out of the cell.

Question 12

Which of the following is an example of a behavioural adaptation?

Accepted Answer

A bird migrating to a warmer climate during winter.

Question 13

Which of the following is a valid hypothesis for an investigation into the effect of temperature on enzyme activity?

Accepted Answer

Enzyme activity will increase as temperature increases up to an optimum point, after which it will decrease.

Question 14

Which of the following best describes the process of diffusion?

Accepted Answer

Movement of molecules from an area of high concentration to an area of low concentration, without requiring energy.

Question 15

Which of the following is a real-world example of convergent evolution?

Accepted Answer

The evolution of wings in bats and birds.

Question 16

A student is analysing data from an experiment and notices that repeated measurements under the same conditions yield similar results. Which term best describes this aspect of the data?

Accepted Answer

Reliability

Question 17

Which of the following is a key ethical consideration when conducting biological investigations involving animals?

Accepted Answer

Ensuring animals are used only when necessary and their welfare is prioritised.

Question 18

Which of the following best explains why models are used in biology?

Accepted Answer

To provide a simplified representation that helps explain complex biological systems.

Question 19

Which of the following is an example of a controlled variable in an experiment investigating the effect of pH on enzyme activity?

Accepted Answer

The temperature at which the reaction occurs.

NSW Stage 6 Biology Syllabus: Structure, Skills, and Core Concepts

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