440 quizzes

Question 1

True or false
Glycoproteins in cell membranes are thought to serve as “antennae” or receptors for various substances that influence cellular function and regulate intracellular communication.

Answer 1

True

Question 2

True or false

Some cell membrane proteins are thought to function as pumps and others as enzymes

Answer 2

True

NA/K pump

ATPase inner mitochondria wall

Question 3

Bicarbonate secreted by the liver aids in neutralizing the acid chyme as it enters the duodenum.

Answer 3

False

By the gallbladder

Question 4

True or false

Blood flow through the capillaries of the GI tract decreases during the digestion and absorption of a meal

Answer 4

False

Increases

Question 5

The enzymatic digestion of starch starts in the mouth

Answer 5

True

Amylase

Question 6

True or false

Amylose has alpha 1,4 bonds between glucose molecules

Answer 6

True

Question 7

True or false

Amylopectin has alpha 1,4 bonds between the glucose molecules

Answer 7

True

And also has alpha 1,6

Question 8

True or false

Cellulose has beta 1,4 bonds between glucose molecules

Answer 8

True

Question 9

Glycogen has alpha 1,6 and beta 1,4 bonds between the glucose molecules

Answer 9

False

Alpha 1,4

Question 10

True or false

Gluconeogenesis is the metabolic process of producing glucose from other nutrients such as amino acids, lactic acids, and most fatty acids.

Answer 10

False

Not most FA, only the 3 carbon one

Question 11

True or false

Flagella are responsible for bacterial motility. They are made up of polysaccharides.

Answer 11

False

made up of proteins

Question 12

True or false

rRNA plays a critical role in transcription

Answer 12

false

mRNA plays a role in transcription
rRNA is utilized in translation

Question 23

Which one of the following is NOT found in all bacterial cells?

A. cell wall
B. cell membrane
C. plasmid DNA
D. ribosome

Answer 23

C

Question 24

Describe the roles of crystal violet, iodine, ethanol, and safranin in gram staining

Answer 24

crystal violet - positive dye to form ionic bond w/ negative bacteria
iodine - an additional molecule that binds to crystal violet molecule and form a molecule that would not seep through pores of bacteria
ethanol - used to destroy ionic bond and strip the dye from the bacteria

Question 25

The following is the sequence of a template strand of DNA

3’ AGT CGA TCG 5’

write the sequence for mRNA transcribed from this DNA

Answer 25

5’ UCA GCU AGC 3’

Question 26

The principle target organ for aflatoxins is

A. kidney
B. brain
C. liver
D. lung

Answer 26

C

Question 27

Moniliformin is mainly produced by

A. penicillium
B. fusarium
C. rhizopus
D. aspergillus

Answer 27

fusarium

Question 28

Define anaphylaxis

Answer 28

Severe allergic reaction that causes the body to release histamine and may cause the airways to tighten. There is a drop in blood pressure that may lead to shock

Question 29

Describe 3 major differences between endospores and conidia

Answer 29

endospores

1. different life preserving process of the cell
2. more resistant to environmental stress
3. one cell, one spore
4. sublethal heating activates endospore form

conidia

1. grows from stem
2. less resistant to environmental stress
3. grows in clusters/chains