Question 1

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

Accepted Answer

Observation, hypothesis, experiment, analysis, conclusion

Question 2

In a controlled experiment testing the effect of ammonium nitrate and light on plant height, which of the following are the independent variables?

Accepted Answer

The amount of ammonium nitrate and light

Question 3

Which of the following is a dependent variable in an experiment measuring the effect of light and ammonium nitrate on strawberry plant growth?

Accepted Answer

The height of the plants

Question 4

A plant takes up nutrients like ammonium nitrate to maintain which of the following processes?

Accepted Answer

Homeostasis

Question 5

Which element makes up the largest percentage of body mass in living organisms, according to the provided table?

Accepted Answer

Oxygen

Question 6

Given the element sodium (Na) with atomic number 11 and mass number 23, how many protons, neutrons, and electrons does a neutral atom of sodium have?

Accepted Answer

11 protons, 12 neutrons, 11 electrons

Question 7

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom

Question 8

Water molecules are described as polar because:

Accepted Answer

The electrons are shared unequally between oxygen and hydrogen, creating partial charges

Question 9

Which property of water allows fish to survive in lakes during winter when air temperatures are below $$0^\circC$$?

Accepted Answer

Water is a liquid at normal physiological temperatures and has its greatest density at $$4^\circC$$

Question 10

Which of the following best explains why sweating and evaporation help reduce a human’s body temperature?

Accepted Answer

Water has a high heat of vaporization, so energy is absorbed from the skin as sweat evaporates

Question 11

Which of the following is the approximate ratio of C:H:O in carbohydrates?

Accepted Answer

$$1:2:1$$

Question 12

Which type of macromolecule is generally composed only of C, H, and O and does not contain N or P?

Accepted Answer

Lipids

Question 13

Which functional group is polar, hydrophilic, and found in all proteins?

Accepted Answer

$$-NH_2$ (amino group)

Question 14

Which of the following is a monomer of proteins?

Accepted Answer

Amino acid

Question 15

A molecule with the formula $$C_6H_{12}O_6$ is most likely a:

Accepted Answer

Monosaccharide

Question 16

Which of the following bonds is responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 17

Which property of water allows it to move up a paper towel when the edge touches a drop of colored water?

Accepted Answer

Adhesion

Question 18

Which of the following is true about nucleic acids?

Accepted Answer

They always contain nitrogen and phosphorus

Question 19

Which of the following is a polymer made up of nucleotides?

Accepted Answer

DNA

Question 20

Which of the following best describes the difference between polar and nonpolar covalent bonds?

Accepted Answer

Polar covalent bonds involve unequal sharing of electrons, while nonpolar covalent bonds involve equal sharing

General Biology: Chemistry of Life, Water, and Organic Macromolecules

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