Bio Chapter 3 Quiz

Amino acids joined by dehydration synthesis reactions

Which of the following would describe a polypeptide?

A nitrogen-containing base, a phosphate group, and a sugar

A nucleotide is made of which of the following chemical components?

a nitrogen-containing base, a phosphate group, and a sugar

A nucleotide is made of which of the following chemical components?

False

A polypeptide forms a pleated sheet or a helix as its primary structure.

A protein is to an amino acid

A starch molecule is to glucose as

nitrogen-containing base, ribose, phosphate

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

C, H, O

Which of the following elements would be found in a carbohydrate?

dehydration reaction

A triglyceride is formed when three fatty acids join a glycerol by a _________________.

CaCO3

Which of the following is not an organic molecule?

carbohydrates, lipids, proteins, and nucleic acids.

The four main categories of organic macromolecules are

number and sequence of amino acids.

The primary structure of a protein refers to the ____________

create cellular energy

The principle role for sugars in living things is to ____________

True

True or False? When starch is digested, an -OH group and an -H group from a water molecule is used in hydrolysis to split the monosaccharide subunits.

Lipids

What category of biological molecules are steroids included in?

-COOH

Which functional group acts as an acid when placed in solution?

glycogen forming glucose molecules

Which of the following is not a dehydration synthesis reaction?

joins an amino acid to an adjacent amino acid

What is the function of a peptide bond?

They possess no double bonds between carbon atoms, which makes them more tightly packed together.

What makes saturated triglycerides considerably less healthy than unsaturated ones?

lettuce

When you eat a salad, which one of the following components will pass through the body with the least amount of digestion?

primary structure

Which of the following is least likely to be affected when a protein is denatured?

fat; dehydration synthesis

The figure below represents the formation of a ________ molecule by the process of ________.

dehydration synthesis

The following figure represents which process?

Hydrophilic

If a material mixes readily with water, it is identified as

hydrophilic.

If a material mixes readily with water, it is identified as ______________

Nucelotide

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

amino acid - protein

In which of the following is the correct monomer matched with its polymer?

Thymine

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

C6H12O6

Which of the following is an organic molecule?

Unsaturated

A fatty acid that has at least two double bonds is called ______________.

Fats with no double bonds

Atherosclerosis is associated with

CH4

Which formula is a hydrocarbon?

Protein; nucleotides

Amino acids are needed to build ________, just as ________ are needed to create DNA.

protein; nucleotides

Amino acids are needed to build ________, just as ________ are needed to create DNA.

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

DNA and RNA differ in that

store the information to make RNA; contain the information to make a protein.

DNA functions to ________, while RNA's function is to________.

polymer, glucose molecules

Glycogen is a ________ made of many ________.

DNA is comprised of a double-strand; RNA is a single-strand.

How does DNA differ from RNA?

They are made of repeated monomer units.

Of the following, which is a feature that proteins and polysaccharides share?

Parts W and Z are hydrophilic

Refer to the figure. Which of the following is true regarding the labeled plasma membrane?

Cellulose

Scientists created an enzyme that will break down any type of carbohydrate. If given to humans, they could use which of the following as a new food source?

fructose - a polysaccharide

Select the incorrect association.

protein

Testosterone is a lipid-based hormone; insulin is a ________-based hormone.

glycogen

Which word does not belong with the others?

cellulose

Wood and cotton cloth are composed of __________________

They will not combine with water

How are lipids different from other categories of biological molecules?

proteins—have three forms: monosaccharides, disaccharides, and polysaccharides

Select the incorrect association.

react a certain way with other molecules.

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

NH2

Which functional group is present in amino acids?

Uracil

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

H2CO3

Which of the following is an organic molecule?

amino acid - peptide - polypeptide

Which of the following is in correct order from smallest to largest?

COCl2

Which of the following is not an organic molecule?

Proteins are used to produce DNA.

Which of the following is not associated with proteins?

enzymatic activity

Which one of the following is a function of proteins?