Peptide bonds link the amino acids together to make a primary polypeptide

Lab Practical                                                                Name_________________________

 

1. Peptide bonds link the amino acids together to make a primary polypeptide sequence. These bonds are:

amide bonds

ether bonds

salt bridges

glycosidic bonds

ester bonds

 

1. If a balloon filled with helium were heated with a blow-dryer, the balloon would:

 

increase in volume

 

decrease in volume

 

maintain the same volume

 

increase in density

 

1. You are setting up an experiment to test a pair of experimental anti-headache medications, X and Y. As part of your experimental setup, you take individuals suffering from headaches and divide them into 4 groups and provide each with a different pill. Which of the 4 groups below would you classify as the positive control group.

 

 

A group given Tylenol, a medication used to treat headaches commercially.

 

A group given your experimental headache treatment X.

 

A group given your experimental headache treatment, Y.

 

              A group given a placebo pill.

 

 

 

 

 

 

1. Which of the following is not normally a part of scientific inquiry?

 

observations

 

philosophizing

 

theories

 

hypotheses

 

experimentation

 

1. An isotope has a total of 46 neutrons and 22 protons. What would be the atomic symbol of this isotope?

 

Sc

 

Ti

 

Pd

 

Na

 

Er

 

1. Which of the following is the correct formula for the nitride ion?

 

N2

 

NO2–

 

NO3–

 

N23–

 

N3–

 

 

 

 

 

 

 

1. Calcium phosphate, Ca3(PO4)2, is used to treat calcium deficiencies. What is the molar mass of this compound?

 

87.05 g/mol
 

167.05 g/mol

 

279.21 g/mol

 

 

230.02 g/mol

 

310.18 g/mol

 

1. Which of the following units can be used to represent the concentration of a solution prepared by dissolving salt in water? Select all that apply.

 

M (mol/liter)

 

mol

 

% mass by volume

 

ml

9. A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

10.0%

9.09%

90.0%

1.00%

225%

10. How many liters of 8 M NaCl solution would you need to add to a reaction that requires 2 moles of NaCl.

2 liters

0.5 liters

0.25 liters

4 liters

16 liters

11.  Which of the following best describes this molecule?

CH3CH2CH2CHCHCH2CH2COOH

saturated fatty acid

polyunsaturated fatty acid

monounsaturated fatty acid

fatty ester

glycerol

 

12.  You have a sample of gas and want to determine the volume, in Liters, that your 3.5 mol H2S(g) sample will occupy at 70 degrees C and 1.75 atm. Show your work