BI203 Midterm 1 Wrong Answers Review

Question 1

Cultures grown from cells of dissociated tissues are called ___ cell cultures.

Answer 1

primary

Question 2

All amino acids that can be phosphorylated are: ___, ___, and ___.

Answer 2

serine, threonine, tyrosine

Question 3

The sodium-glucose transporter is a carrier protein which transports glucose from the intestinal lumen into the cells. It gets its energy from ___.

Answer 3

Na+

Question 4

In Familial Hypercholesterolemia patients, they have a mutation which interferes with the binding between the ___ ___ and ___ ___.

Answer 4

LDL receptor, adaptor proteins

Question 5

GPI-anchors are ___ a common lipid modification to proteins.

Answer 5

NOT

Question 6

After two rounds of replication in the new media in the Meselson and Stahl experiment, the results will be answer choice C.

This is an image of a DNA strand in the ___ weight, and one ___ DNA strand. One DNA will be half ___ and ___, and the other will be pure ___.

Answer 6

middle, heavy, 14N and 15N, 15N

Question 7

___ cannot change the equilibrium point for reactions that they catalyze.

Answer 7

enzymes

Question 8

Single-stranded DNA has definitively different amounts of bases. (i.e. 12% A, 12% T, 30% G, 46% C). This is because if they have equal/matching amounts of bases, then the DNA could be ___ instead.

Answer 8

double-stranded

Question 9

___ ___ along the protein backbone allow a-helices and b-pleated sheets to be made.

Answer 9

Hydrogen bonds

Question 10

The bacteria could ___ cause infection -> this is why the heat-killed smooth strain did ___ kill the Group 3 mice.

Answer 10

NOT, NOT

Question 11

Placement of the cell in a ___ environment will decrease the rate of ATP consumption by the Na+/K+ pump.

Answer 11

hypertonic

Question 12

___ is a hormone which requires a membrane receptor to signal cells. It is a hormone that is NOT lipid-soluble like steroid hormones.

Answer 12

glucagon

Question 13

___ lower the potential energy of lipids during their transfer from one bilayer to another.

Answer 13

flippases

Question 14

Transporter proteins and ion channels function in membrane transport by providing a ___ pathway through the membrane for specific polar solutes or inorganic ions.

Answer 14

hydrophilic

Question 15

___ ___ ___ is NOT appropriate if you want to examine the transcriptome of a specific tissue.
___ ___ ___ only looks at where a transcript is, not how much there is, or how much is expressed.

Answer 15

In situ hybridization

Question 16

Purifying insulin from ___ is a better way to produce insulin for diabetics than using insulin purified from pig pancreases.

Answer 16

bacteria