EXAM 1 - REAL QUESTIONS

Question 1

which level of protein structure is determined by the sequence of amino acids?

1
2
3
4

Answer 1

primary

Question 2

which of the following is a strong bond type that involves the direct sharing of electrons between 2 atoms?

ionic bond
hydrophobic interaction
hydrogen bond
none of the above

Answer 2

none of the above, covalent

Question 3

which nucleic acid containes the sugar ribose

DNA
RNA
both DNA and RNA
neither DNA and RNA

Answer 3

RNA

Question 4

which of the following best describes pynocitosis

Answer 4

The bulk uptake of extracellular fluid and solutes by membrane invagination

Question 5

which of the following is not a function of carbs in living organisms?

a) long term energy storage
b) structural support
c) cell signaling
d) enzymatic catalysis

Answer 5

d) enzymatic catalysis

Question 6

which of the following is a dissacharide
a) glucose
b) sucrose
c) fructose
d) none of the above

Answer 6

b) sucrose

Question 7

a denatured protein has lost its:
A) H bonds
b) function
c) shape
d) all of the above

Answer 7

d) all of the above

Question 8

which of the follwing is not a type of passive transport
a) simple diffusion
b) facilitated diffusion
c) osmosis
d) sodium-potassium pump

Answer 8

d) sodium-potassium pump

Question 8

which of the following statements about chitin is true?
a) chitin is a type of nucleic acid found in the cell nucleus
b) chitin is a carb polymer found in the exoskeleton of arthropods
c) chitin is a type of protein that provides structural support to cell membranes
d) chitin is a lipi molecule involve din energy storage in plant cells

Answer 8

b) chitin is a carb polymer found in the exoskeleton of arthropods

Question 9

define tonicity

Answer 9

tonicity describes the relative concentration of solutes in and out of a cell

Question 10

triglycerides consist of 3 fatty acids atteched to a glycerol molecule
true
false

Answer 10

true

Question 11

denaturation of proteinms involves the breakdown of peptide bonds
true
false

Answer 11

false, breaks down H bonds (that make the shape of the protein)

Question 12

cellulose is a polysaccharie found in plant cell walls
true
false

Answer 12

true

Question 13

osmosis is the movement of H20 molecules from an area of high solute concentration to low solute concentration
true
false

Answer 13

false, opposite: low to high concentration

Question 14

peptide bonds link nucleotides together in nucleic acids
true
false

Answer 14

false, they link 2 amino acids together in polypeptides or proteins

Question 15

lipids are large polar molecules made up of mostly carbon and H
true
false

Answer 15

false, non-polar

Question 16

channel proteins facilitte direct communication across the cell membrane by forming a continous pore
true
false

Answer 16

true

Question 17

what is the role of ATP in cellular processes

Answer 17

it stores chemical enery for short periods
it powers biochemical reactions
the energy betwen the bonds connect the 3 phosphate molecules together
when those bonds are broken, high energy release

Question 18

give 2 examples of an ATP driven cellular activity

Answer 18

ATP synthase
endocytosis
pumps

Question 19

is butter saturated or unsaturated fat?

Answer 19

saturated, double bond but no kink

Question 20

is vegetable oil saturated or unsaturated fat?

Answer 20

unsaturated, double bond + kink

Question 21

which level of protein structure involves the folding of the polypeptide chain into an alpha-helix or beta-sheet?

Answer 21

secondary structure

Question 22

what type of bonds form betwee amino acids during protein synthesis?

Answer 22

peptide bonds