T or F: Homeostasis is the ability of the body or a cell to seek and maintain an condition of stability within its internal environment when dealing with the external changes?
True
Which of the following would be an example of a hypothesis?
D. Man-made pollution causes global warming.
When graphing data, the dependent variable is on the ___ axis and the independent variable is on the ___ axis?
Y,X
Circadian rhythms are ___ rhythmic changes in behavior or physiological processes?
Daily
What is the median of the following set of numbers: 2,10,20,25,60,75,101?
25 (what # is in the middle?)
What is the mode of the following set of numbers: 10,5,12,8,6,5,21,15?
5 (the # that appears the most)
What is the range of the following set of numbers? 10,50,100,200,500?
490 (lowest # subtracted from the highest #)
What is the standard deviation of the follow set of numbers: 1,3,6,10?
3.9
1. Find the mean of each #
2. Subtract the mean from each #
3. Square each answer (multiply each by itself)
4. Add each answer together.
5. Divide by the number of #’s -1
6. Square root the answer
_____ refers to how close to the actual or true value of a measurement is?
FILL IN THE BLANK
Accuracy
_____ refers to the repeatability of the measurement?
FILL IN THE BLANK
Precision
What is the BMI of a male who weighs 77.8kg and is 1.8 meters?
24 (w/h2)
Biruet Reagent (coomassie blue) reacts with which of the following substances to determine its concentration in a solution?
Proteins
If you want to make a 05. Liter of a 1 M solution of NaCl using a 4 M stock solution of NaCl, how much of the stock solution would you have to add?
125 ml (c1v1=c2v2)
The greater the number of particles in a solution, the ____ the Optical Density (OD)?
Higher
Given the data in the following table, find the unknown (BSA) ug/ml in cuvette6. Use the x-y graph at right to plot both the standard curve and the unknown BSA concentration
750
T or F Diffusion is a physical process in which molecules move from an area where there are in high concentration to one where their concentration is lower
True
Which of the following factors do not affect diffusion?
pH
T or F Permeable solute affects tonicity across a semi-permeable membrane?
False
If you took a red blood cell (RBC) and placed it in a beaker with water from the Great Salt Lake, what would occur?
The red blood cell would crenate
If a RBC is placed in a hypotonic solution then water will___?
Flow into the cell
If a RBC is placed in a hypertonic solution, then water will ___?
Flow out of the cell
T or F If nothing hinders the movement of a solute, it will diffuse until it reaches equilibrium.
True
What is the osmolarity of a 20% glucose solution? (Hint: the MW of glucose is 180g/mole and 20% solution contains 20g/100ml.) Show your work
uppose you had solutions in questions 23 and 24 separated by a membrane in a beaker. If only water could pass through the membrane, which way would it diffuse?
Toward the MgCl2
Which enzyme is missing from the equation:
______ lipid+? à lipid-? Complexà monoglyceride (or glycerol)+fatty acids+?
FILL IN THE BLANK
Lipase
Which enzyme is missing from the equation:
______starch + ? àstarch-?complexà maltose + ?
FILL IN THE BLANK
Amalase
Which enzyme is missing from the equation:
______ protein + ? -->protein- ? complex -->peptides+?
FILL IN THE BLANK
Pepsin
T or F: Buffering a solution has no effect on enzyme activity
FALSE
Which method is used to detect the presence of maltose?
Benedict’s Test
Which substance is needed for emulsification?
Bile Salts
E_______L_______ImmunoSorbent Assay
FILL IN THE BLANK
Enzyme Linked
The ELISA we performed in lab for anti-HIV antibodies. Which procedure did we follow?
