ICC Bio Class 1 ?s

Biological Macromolecules

b

Which of the following amino acidss would be involved in the formation of a disulfide bridge

a. glutamine

b. cysteine

c. arginine

d. methionine

e. proline

c

Preventing fermentation of hydrogen bonds would most impact which level of protein structure?

a. quaternary

b. tertiary

c. secondary

d. primary

e

Formation of peptide bonds always leads to the formation of:

a. R groups

b. amino groups

c. ring structure

d. double bonds to oxygen

e. water

c

K-Ras is a 21 kDa protein with GTPase activity. This molecule contains which of the following?

a. pyrimidine

b. transversion

c. arginine

d. hexokinase

e. glycerol

d

Protein buffers are used in extra- and intracellular fluids to maintain pH. The functional groups of the amino acids allow the buffering effect, by which _____ will donate an H+ ion and ____ binds an H+ ion.

a. SH, COOH

b. NH2, COOH

c. COOH, SH

d. COOH, NH2

e. NH2, SH

e

Each of the following is composed only of glucose monomer EXCEPT one. Which one is the EXCEPTION?

a. maltose

b. cellulose

c. glycogen

d. starch

e. sucrose

d

Lactose, maltose, and sucrose are all:

a. polysaccharides

b. linked internally via phosphodiester bonds

c. dimers containing an NCC-backbone

d. disaccharides

e. found in nucleotides

b

In humans, glycogen is found in high concentrations in which of the following tissues?

a. cell walls

b. liver and skeletal muscle

c. adipocytes

d. chitin and cellulose

e. bone and cartilage

a

A triglyceride molecule contains all of the following components EXCEPT:

a. three R groups the most be identical

b. three fatty acids

c. glycerol

d. three R groups that may be identical

e. three R groups that are either saturated or unsaturated

d

Which of the following statement best describes the role of cholesterol in the body?

a. it is a component of lipid bilayers and is the building block for peptide hormones

b. it is derived from food consumed and is a component of ribosomes

c. it can form complexes with proteins and is not capable of diffusing into cells alone

d. it is the building block for steroid hormones and is synthesized in the liver

e. it is stored in intracellular vesicles

e

Phospholipids are the main building block of:

a. connective tissue

b. extracellular matrix

c. serum

d. cell wall

e. plasma membranes

a

ATP is composed of all of the following EXCEPT:

a. a pyrimidine base

b. two high-energy phosphate bonds

c. ribose

d. a sugar with a 2’ OH group

e. three phosphate groups

b

Which of the following will be true of a 300 nucleotide segment of double-stranded DNA?

a. it must be localized to the nucleus of a cell

b. it will have predictable base pair patterning

c. adenine will bind to uracil via three hydrogen bonds

d. there will be two hydrogen bonds between guanine and cytosine

e. the segment will contain two 3’ to 5’ parallel strands

b

Which of the following is a characteristic of RNA that makes it most distinct from DNA in vivo?

a. the presence of uracil, which is complimentary to thymine

b. single-stranded

c. 5’ to 3’

d. anti-parallel

e. complimentary base pair bonding

d

Which of the following is the correct pairing of macromolecules and function?

a. starch - glucose storage in animals

b. glycogen - glucose storage in plants

c. hemoglobin - protein with quaternary structure

d. peptidoglycan - bacterial cell wall

e. cellulose - fungal cell wall

a

Biological monomers are connected to each other via covalent bonds. A specific example of this is:

a. amino acids - peptide bonds

b. glucose and maltose - glycosidic bridge

c. glycerol and fatty acid - phosphodiester bond

d. nucleotides - N-glycosidic bond

e. ribose and nitrogenous base - ester linkage