Question 1

Which of the following best describes a hypothesis in the context of the scientific method?

Accepted Answer

A tentative explanation that can be tested by experiments.

Question 2

In a controlled experiment testing the effect of fertilizer on plant growth, which variable is the dependent variable?

Accepted Answer

The growth measured in height or biomass of the plants.

Question 3

Which property is NOT considered a property of life?

Accepted Answer

Ability to form ionic bonds.

Question 4

Charles Darwin's theory of evolution is best summarized by which phrase?

Accepted Answer

Descent with modification.

Question 5

Which of the following is the correct sequence of steps in the scientific method?

Accepted Answer

Observation → Hypothesis → Prediction → Experiment → Analysis

Question 6

When graphing experimental data, where should the independent variable be placed?

Accepted Answer

On the x-axis (horizontal axis)

Question 7

Which of the following is an example of unity among living organisms?

Accepted Answer

All organisms use DNA as their genetic material.

Question 8

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electron pairs between atoms.

Question 9

A radioactive isotope of carbon ($$^{14}C) is $$used in radiometric dating. What property makes it useful for this purpose?

Accepted Answer

It emits radiation at a predictable rate, allowing age determination.

Question 10

Which of the following elements is considered a trace element in living organisms?

Accepted Answer

Iron

Question 11

Which subatomic particle determines the atomic number of an element?

Accepted Answer

Proton

Question 12

Which type of chemical bond is responsible for the partial positive and partial negative charges in a water molecule?

Accepted Answer

Polar covalent bond

Question 13

Which of the following best explains why noble gases are generally unreactive?

Accepted Answer

They have a full complement of valence electrons.

Question 14

A molecule of methane ($$CH_4) $$contains how many single covalent bonds?

Accepted Answer

$$4$$

Question 15

Which of the following is true about hydrogen bonds?

Accepted Answer

They occur between molecules with polar covalent bonds.

Question 16

Which equation correctly represents the relationship between atomic number ($$Z$$), number of protons ($$p$$), and number of neutrons ($$n) in an $$atom?

Accepted Answer

$$Z = p$$

Question 17

A scientist is studying the effect of temperature on enzyme activity. She keeps pH, substrate concentration, and enzyme concentration constant. What are these constant factors called?

Accepted Answer

Control variables

Question 18

Which of the following best describes chemical equilibrium in a reaction?

Accepted Answer

The forward and reverse reaction rates are equal.

Question 19

Which of the following scenarios best illustrates the concept of descent with modification?

Accepted Answer

A population of bacteria develops resistance to antibiotics over several generations.

Question 20

Which of the following is a real-world example of a hydrophobic interaction?

Accepted Answer

Oil droplets clustering together in water.

General Biology I: Study Guide for Exam 1 (Chapters 1 & 2)

Study Guide - Practice Questions

Study Guide - Flashcards