Question 1

Which of the following is NOT considered a characteristic of living organisms according to biologists?

Accepted Answer

Ability to rust when exposed to oxygen

Question 2

A scientist observes that a new plant species grows faster in red light than in blue light. Which step of the scientific method is the scientist performing?

Accepted Answer

Making an observation

Question 3

Which of the following best describes a peptide bond?

Accepted Answer

A bond formed between two amino acids

Question 4

Which of the following elements is NOT one of the four most abundant elements in the human body?

Accepted Answer

Calcium

Question 5

A molecule of water (H$$_2O) is $$held together by which type of bond?

Accepted Answer

Polar covalent bond

Question 6

Which of the following best explains why saturated fatty acids are solid at room temperature while unsaturated fatty acids are liquid?

Accepted Answer

Saturated fatty acids have straight chains that pack closely together

Question 7

Which of the following is an example of a dehydration synthesis reaction?

Accepted Answer

Combining two amino acids to form a dipeptide and water

Question 8

A DNA strand is held together by hydrogen bonds between which components?

Accepted Answer

Nitrogenous bases

Question 9

Which of the following is a correct pairing of a macromolecule and its monomer?

Accepted Answer

Nucleic acid – nucleotide

Question 10

A patient is diagnosed with a genetic disorder that affects the structure of their glycogen. Which macromolecule is most directly affected?

Accepted Answer

Polysaccharide

Question 11

Which of the following best describes the difference between an ionic bond and a covalent bond?

Accepted Answer

Ionic bonds involve transferring electrons, covalent bonds involve sharing electrons

Question 12

Given an atom with atomic number 8 and mass number 16, how many neutrons does it have?

Accepted Answer

8

Question 13

Which of the following is a correct example of a polysaccharide and its biological function?

Accepted Answer

Glycogen – energy storage in animals

Question 14

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom and an electronegative atom

Question 15

Which of the following statements about triglycerides is correct?

Accepted Answer

They are composed of three fatty acids and one glycerol molecule

Question 16

A student mixes vinegar (acetic acid) and baking soda (sodium bicarbonate) and observes bubbling. Which of the following best describes what is happening?

Accepted Answer

A chemical reaction is producing carbon dioxide gas

Question 17

Which of the following best explains why water is an excellent solvent for many biological molecules?

Accepted Answer

Water is polar and can form hydrogen bonds with other polar molecules

Question 18

Which of the following is a correct description of a dehydration synthesis reaction?

Accepted Answer

A reaction that joins monomers to form polymers by removing water

Question 19

Which of the following best describes the difference between a saturated and an unsaturated fatty acid?

Accepted Answer

Saturated fatty acids have only single bonds between carbon atoms

Question 20

Which of the following is a correct example of a protein and its function?

Accepted Answer

Hemoglobin – transports oxygen in the blood

General Biology: Introduction to Human Biology and Chemistry of Living Things

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