Chapter 3

What category of biological molecules are steroids included in?

lipids

A gene in DNA is the code for

sequence of amino acids

Select the INCORRECT association:

proteins- have 3 forms: monosaccharides, disaccharides, and polysaccharides

Which of the following is an organic molecule?

C6H12O6 - Glucose

Which of the following is not an organic molecule?

CaCO3

Deoxyribose is a sugar found in

DNA

How does DNA differ from RNA?

DNA is comprised of a double strand, RNA is a single strand.

DNA and RNA differ in that

DNA is double stranded, contains the sugar deoxyribose and the nitrogen containing base thymine while RNA is single stranded, contains sugar ribose and the nitrogen containing base uracil.

What makes saturated triglycerides considerably less healthy than unsaturated ones?

They possess no double bonds between carbon atoms making them more tightly packed together.

A molecule is said to be organic if it contains

carbon and hydrogen atoms

A fat is formed when three fatty acids join a glycerol by a

dehydration reaction.

The following figure represents which process?

dehydration synthesis

Which one of the following is a function of proteins?

enzymatic activity

The principle role for sugars in living things is

for creating energy

Humans store their polysaccharides in the form of

glycogen

Which of the following is NOT a dehydration synthesis reaction?

glycogen forming glucose molecules

Which of the following correctly lists the parts of a nucleotide of RNA?

nitrogen-containing base, ribose, phosphate

In the diagram below, the monomer that serves as the subunit to creating this organic molecule category is called

nucleotide

The "primary structure" of a protein refers to

number and sequence of amino acids

Glycogen is a ________ made of many __________.

polymer ... glucose molecules

The term "functional" is used in the phrase "functional group" because it describes a group of atoms

that react a certain way with other molecules.

Which nitrogen containing base is found in DNA but not in RNA?

thymine

In sickle cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for hemoglobin.

true

The shape of a protein is a critical factor in its function.

true

Digestion of sucrose, a disaccharide, results in

two monomers