Lecture 2 Exam Questions Flashcards
Enzymes belong to which group of organic molecules?
Proteins
The substance that an enzyme works upon is called a:
Substrate
The thousands of different chemical reactions occurring in a cell at any moment are referred to as a cels:
Metabolism
Know where a non competitive inhibitor would bind on an enzyme
The process whereby cells completely break down glucose to COz and water for energy is:
cellular respiration
A molecule that undergoes reduction:
gains one or more electrons.
During glycolysis, the electrons that are removed from glucose are transferred to molecules ofi
NAD+
Which statement about glycolysis is FALSE?
Correct!
Glycolysis makes two molecules of pyruvic acid,
Glycolysis does not require oxygen
CO2 and H20 are products of glycolysis.
Glycolysis happens during fermentation
CO2 and H20 are products of glycolysis.
In prokaryotes, how many ATP molecules are produced from the breakdown of one glucose via aerobic respinaton
38
Put the following steps in order
l. Enzyme-substrate complex
ll. Substrate binds active site
lll. Enzyme free to interact with substrate
lV. Product release
V. Product is formed
lll, ll, l, V, lV
In yeast fermentation:
alcohol and carbon dioxide are given off
The NADH molecules formed during the Krebs cycle are
oxidized when electrons are passed to the electron transport chain
The production of dairy products such as cheese and yogurt or pickled foods requires which of the following
lactic acid fermentation
An organism that uses oxygen when present but can grow without oxygen is called an
facultative anacrobe.
Microbes that are introduced into a culture medium to initiate growth are called an
inoculum.
Your lab instructor hands you a culture and tells you that there are two different types of bacteria groning in it Pudonones and Staphylococcus. If you wanted to grow just Staphylococcus colonies, you would need to use an
selective medium
Even though the use of agar is sometimes attributed to Robert Koch, you know the real mastermind behind this great idea was
Fannie Hesse
During which growth phase are bacteria MOST susceptible to penicillin?
Log
A spectrophotometer can be used to measure:
Turbidity
Aunt Melba brings her famous potato salad to the annual family Fourth of July picnic. She arives at 10.00 AM, and on one potato there is a small colony of 100 Salmonella bacteria. The edge of the potato salad is warm, and the cells divide every 20 minutes.
When you unknowingly scoop the entire colony onto your plate at 12.00 PM, how many salmonella are you infecting yourself with
6,400
The phase of the bacterial growth curve in which newdy inoculated cells are adjusting to ther new envionnent life, (they are metabolizing but not actively dividing) is the:
Lag phase
I find a gallon of milk at the back of my fridge and realize it is past its expiration date. 1 take a 1 ml. sample and perform a serial dilution, then inoculate a series of growth plates. After incubation, I count 36 colonies on the growth plate labeled 1:10,000 dilution
Thus, my original sample contained:
3.6 x 10^5 bacteria per mL
To sterilize heat-sensitive solutions such as culture media, enzymes, and vaccines, one should use:
filtration
In the assigned article, food and nutrition specialist Julie Garden-Robinson stated that tragedies similar to the Heirs delay decer part occurred around the same time in North Dakota because the food in the jars:
did not have enough acid.
