Which of the following biological molecules contain peptide

Which of the following biological molecules contain peptide bonds? a. b. c. d. Proteins Carbohydrates Lipids Nucleic Acids

A C Which one is… 1. a lipid 2. a nucleotide 3. an amino acid 4. a carbohydrate B D

What is the function of chaperonin proteins? a. b. c. d. e. Denaturation of polypeptides Assembling amino acids Regulation of gene expression Folding proteins None of the above

Which amino acid is responsible for the formation of disulfide bonds? a. b. c. d. e. Alanine Proline Tyrosine Cysteine Isoleucine

Which amino acid would be considered basic? a. b. c. d. e. Alanine Lysine Tyrosine Cysteine Isoleucine

Which amino acid would be considered acidic? a. b. c. d. e. Alanine Lysine Tyrosine Glutamate Isoleucine

The addition of water to break a chemical bond is termed – a. b. c. d. e. Dehydration synthesis Hydrolysis Condensation Catabolism Disassociation H 2 O

Which of the following is not a function of proteins? a. b. c. d. e. Coding for polypeptides Catalyzes chemical reactions Transport of material Structural components of tissues All of the above are protein functions

The 2 strands of a DNA double helix are covalently bonded together with phosphodiester bonds. a. This is true b. This is false

The energy in carbohydrates is stored in the C-H bonds. a. This is true b. This is false

If a chromosome contains 20% thymine, how much guanine should it have? a. b. c. d. 10% 20% 30% 40%

Which of the following is an amino group? a. b. c. d. e. -OH -C=O -COOH -SH -NH 2

Dehydration synthesis – a. b. c. d. e. Is used to link monomers Removes water to form bonds Is involved in protein synthesis Can form disaccharides All of the above

Lincosamides are a class of antibiotics that inhibit peptide bond formation. What type of biological molecule would be affected? a. b. c. d. Lipids Proteins Nucleic Acids Carbohydrates

A person is lactose intolerant. What type of molecule is lactose? a. b. c. d. Monosaccharide Disaccharide Oligosaccharide Polysaccharide

If a strand of DNA has a sequence 5’-ATCCTAG-3’, what would be the complementary sequence? a. b. c. d. 5’-CGAAGAT-3’ 5’-TAGGATC-3’ 3’-TAGGATC-5’ 3’-CGAAGTC-5’

If a cell was grown in a growth medium that has a radioactive sulfur isotope which class of biomolecules will show the presence of the isotope? a. b. c. d. Nucleic acids Carbohydrates Lipids Proteins

How can changes in p. H affect protein structure? A. B. C. D. By causing hydrolysis of the peptide bond By changing the charges on certain amino acid sidechains By breaking the sidechains off of the alpha carbons By joining proteins together in long chains

This would be : A. beta sheet; B. alpha helix; C. nucleic acid; D. lipid

• Most biological buffers consist of a pair of molecules, one an acid and one a base 21