Biology Chapter 3

How many carbon atoms are there in a molecule of glucose, C6 H12 O6? A) 1 B) 6 C) 12 D) 24

6

The nucleotide that supplies energy for condensation synthesis is A) adensonine triphosphate B) guanine C) thymine D) cytosine

Adensonine triphosphate

Which of the following statements about cholesterol is true? A) it is a steroid B) it is used to make the sex hormones, estrogen and testosterone. C) it has a backbone of four fused carbon rings. D) all of the above

All of the above

The monomers of proteins are A) amino acids B) monosaccharides C) glycerol D) nucleotides

Amino acids

DNA is single-stranded, but RNA is double stranded. True or false.

False

After hydrolysis of s triglyceride, we would have A) many amino acids B) different types of nucleotides C) fatty acids and glycerol D) monosaccharides and disaccharides

Fatty acids and glycerol

Since carbon has four electrons in its outermost shell it can bind to as many as_____ other atoms. A) two B) four C) six D) eight

Four

Animal cells store extra glucose as A) starch B) chitin C) cellulose D) glycogen

Glycogen

Organic molecules are ones that always contain A) carbon and nitrogen B) hydrogen and carbon C) hydrogen and phosphorus D) carbon and potassium

Hydrogen and carbon

The process by which polymers are turned into monomers is called A) condensation synthesis B) ionization C) hydrolysis D) phagocytosis

Hydrolysis

The bond between two amino acids is A) formed by hydrolysis B) an ionic bond C) nonpolar D) known as a peptide bond

Known as a peptide bond

Dairy products contain the disaccharide _____, which some people are unable to digest. A) cellulose B) lactose C) starch D) glucose

Lactose

Which of the following is considered a macromolecule? A) nucleic acid B) amino acid C) fatty acid D) None of the above

Nucleic acid

Which is the INCORRECT association between monomer and polymer? A) monosaccharide - polysaccharide B) nucleic acid - polypeptide C) nucleotide- nucleic acid D) amino acid - polypeptide

Nucleic acid - polypeptide

Carbohydrates include all of the following EXCEPT A) ribose B) glucose C) phospholipid D) starch

Phospholipid

The plasma membrane is primarily composed of A) phospholipids B) waxes C) fats D) all of the above

Phospholipids

The sequence of amino acids in a protein determines its A) primary structure B) secondary structure C) tertiary structure D) quarternary structure

Primary structure

Which of the following is NOT one of the classes of primary organic molecules? A) carbohydrates B) proteins C) salts D) nucleic acids

Salts

Carbohydrates are commonly described as A) oils B) waxes C) sugars D) proteins

Sugars

The three-dimensional shape of a polypeptide is associated with its A) primary structure B) secondary structure C) tertiary structure D) quarternary structure

Tertiary structure

Carbohydrates typically have twice as many hydrogen atoms as they do carbon and oxygen atoms. True or false.

True

Diets high in saturated fat have been associated with cardiovascular disease. True or false.

True

Phospholipids have a hydrophilic head (phosphate group) and hydrophobic tails (fatty acids). True or false.

True

When you boil an egg, the white becomes hard because the albumin protein is denatured by the heat. True or false.

True

During hydrolysis _____ is used to break a bond A) starch B) cholesterol C) water D) DNA

Water