LSU WITH COMPLETE SOLUTIONS
An element has 8 protons, 9 neutrons, and 8 electrons. What are its atomic number and
mass? - ANSWER-8 and 17
How many and what type of bonds does sulfur usually form in biology? - ANSWER-2
covalent
A molecule that has all non polar covalent bonds would be________. - ANSWER-
hydrophobic
What substance makes up the interior of a potato tuber? - ANSWER-starch
What is an example of a lipid? - ANSWER-triglyceride
One characteristic shared by sucrose, lactose, and maltose is that __________. -
ANSWER-they are all dissacharides
The overall 3d shape of a single polypeptide is called the ______. - ANSWER-tertiary
structure
Which of the following functional groups is the most basic? - ANSWER-R-NH2
A chemical reaction that requires energy to take place is called_____. - ANSWER-an
endergonic reaction
The cells in celery stalks at the store are________. - ANSWER-alive
What is an example of primary protein structure? - ANSWER-the protein sequence is
leu-val-gly
What is the chemical formula of a 4 carbon structure? - ANSWER-C4H8O4
One strand of a DNA molecule has the base sequence 5'-ATAGGT-3'. The
complementary base sequence on the other strand of DNA will be 3'-__________-5'. -
ANSWER-TATCCA or 5' ACCTAT 3'
Consider the isotopes of carbon, 12C, 13C, and 14C. Which of them is/are radioactive?
- ANSWER-14C
Which carbon isotope or isotopes are naturally occurring? - ANSWER-12C 13C and
14C all are naturally occurring
, A cell has a diameter of 10um. What is that distance in millimeters?
A. 10mm D. 0.01mm
B. 1mm E. 0.001mm
C. 0.1mm - ANSWER-D. 0.01mm
When placed in a hypotonic solution, animal cells - ANSWER-Enlarge and perhaps
rupture
What is the cytoskeleton made of? - ANSWER-proteins
What type of linkage connects glucose in cellulose? - ANSWER-Beta-glycosidic
linkages
The molecular formula of glucose is C6H12O6. What would be the molecular formula of
a polymer made by linking ten glucose molecules together by dehydration reactions? -
ANSWER-C60H102O51
Which of the following represents a polar covalent bond? - ANSWER-H---O
The H+ concentration in a cola is 1x10^-4. What is the pH and OH- concentration of the
solution? - ANSWER-4 and 1x10^10M
A compound contains hydroxyl groups as its predominant functional group. Which of the
following statements is true concerning this compound? - ANSWER-It should dissolve in
water
A protein becomes damaged and the cell needs to destroy it and recover the amino
acids in the protein. Which organelle will perform the function? - ANSWER-d. lysosome
Place the following in correct order from smallest to largest. These are in no particular
order
triglyceride, human fibroblast cell, lysosome, and amino acid - ANSWER-amino acide,
triglyceride, lysosome, human fibroplast cell
What are the steps of the scientific method? - ANSWER-observation, hypothesis,
experiment, conclusion
How does an enzyme catalyze a reaction? - ANSWER-by lowering the energy of
activation of a reaction
Where is Rubisco located in the chloroplast? - ANSWER-chloroplast stroma
The making of an exact copy of DNA is called_____. - ANSWER-DNA replication