Q: Which equation best represents the transformation of energy in cellular respiration?

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

Question 1

Which of the following best describes a scientific theory in biology?

Accepted Answer

A comprehensive explanation supported by abundant evidence that allows predictions.

Question 2

Which theme in biology is most directly illustrated by the process of photosynthesis converting sunlight into chemical energy?

Accepted Answer

Energy Transfer

Question 3

A scientist wants to test the effect of temperature on enzyme activity. She keeps all other factors constant except temperature. Which step of the scientific method does this best represent?

Accepted Answer

Conducting an experiment changing one variable at a time

Question 4

Why is disproving a hypothesis considered important in the scientific process?

Accepted Answer

It helps refine or reject incorrect explanations, leading to better understanding.

Question 5

Which of the following scenarios best demonstrates the theme of 'Relationship of Structure & Function'?

Accepted Answer

A bird’s hollow bones enabling flight.

Question 6

In the scientific method, what is the purpose of having replicates in an experiment?

Accepted Answer

To ensure results are reliable and not due to random chance.

Question 7

Which equation best represents the transformation of energy in cellular respiration?

Accepted Answer

$\mathrm{C_6H_{12}O_6} + 6\mathrm{O_2} ightarrow 6\mathrm{CO_2} + 6\mathrm{H_2O} + 	ext{energy}$

Question 8

A student observes that plants in a shaded area grow taller than those in direct sunlight. Which step of the scientific method should the student perform next?

Accepted Answer

Formulate a hypothesis explaining the observation.

Question 9

Which of the following is an example of 'Regulation' in living organisms?

Accepted Answer

A lizard basking in the sun to raise its body temperature.

Question 10

Which theme is best illustrated by the fact that DNA is passed from parent to offspring, ensuring traits are inherited?

Accepted Answer

Continuity and Change

Question 11

A researcher finds that her data does not support her original hypothesis. According to the scientific method, what should she do next?

Accepted Answer

Revise the hypothesis or pose a new one.

Question 12

Which of the following best exemplifies 'Interdependence in Nature'?

Accepted Answer

Coral reefs providing habitat for many marine species.

Question 13

Which process is most directly related to the theme of 'Evolution'?

Accepted Answer

Natural selection leading to changes in allele frequencies over generations.

Question 14

Which of the following is NOT a step in the scientific method?

Accepted Answer

Prove the hypothesis is always correct.

Question 15

A biologist is studying how a new drug affects heart rate in mice. She keeps all other conditions constant except the drug dosage. What is the independent variable in her experiment?

Accepted Answer

Drug dosage

Question 16

Which of the following best describes the flow of the scientific method as shown in the diagram?

Accepted Answer

Observations lead to a question, which leads to a hypothesis, followed by predictions and testing.

Question 17

Which of the following real-world examples best illustrates the theme 'Science, Technology and Society'?

Accepted Answer

Development of vaccines to prevent disease outbreaks.

Question 18

Which formula represents the process of photosynthesis?

Accepted Answer

$6\mathrm{CO_2} + 6\mathrm{H_2O} + 	ext{light energy} ightarrow \mathrm{C_6H_{12}O_6} + 6\mathrm{O_2}$

Question 19

Which of the following best demonstrates the theme of 'Continuity and Change' in a population of bacteria exposed to antibiotics over several generations?

Accepted Answer

Some bacteria survive and pass on resistance genes, changing the population over time.

Chapter 1: Introduction – Themes in the Study of Life

Study Guide - Practice Questions

Study Guide - Flashcards