BSC 1005 BSC1005 MIDTERM MDC ALL 100
QUESTIONS AND CORRECT DETAILED
ANSWERS |ALREADY A GRADED | NEW AND
REVISED
Which of the following is true regrading a DNA molecule? - ANSWER-
The amount of adenine is equal to the amount of thymine, and the
amount of guanine is equal to the amount of cytosine.
The following molecule is best described as _______.
CH3-CH2-CH2-CH2 - ANSWER- hydrocarbon.
Enzymes are? - ANSWER- proteins.
Destruction of a proteins shape is called _____. - ANSWER-
denaturation
How do radioactive isotopes differ from isotopes? - ANSWER-
RADIOACTIVE ISOTOPES: UNSTABLE
ISOTOPES: STABLE
What are the reactant(s) in the following chemical reaction?
An uncharged atom of gold has an ATOMIC NUMBER of 79 and an
ATOMIC MASS of 197.
This atom has _____ protons, _______ neutrons, and ______ electrons. -
ANSWER- 79....118....79
Sweating cools your body by ____. - ANSWER- evaporative cooling.
The hydrogens and oxygen of a water molecule are held together by
______ bonds. - ANSWER- Covalent.
The four most common elements found in living things are ______. -
ANSWER- Carbon, oxygen, nitrogen, and hydrogen.
In the following reaction, what type of bond is holding the two atoms
together?
K + C1---> K+ + C1- ---> KC1 - ANSWER- Ionic.
Why (if you are careful) are you able to float a needle on the surface of
water? - ANSWER- The surface tension due to the waters cohesive
properties makes this possible.
, Amino acids include a side group as well as _____. - ANSWER- - a
central carbon
- a hydrogen atom
- an amino group
- a carboxyl group
LOOK UP FIGURE TO - ANSWER- Single DNA structure.
People with lactose intolerance do not have enough - ANSWER- lactase
_____ is a steroid. - ANSWER- Estrogen.
If one strand of a DNA double helix has the sequence AGTACTG, what
will be the sequence of the other strand? - ANSWER- TCATGAC
How does RNA differ from DNA? - ANSWER- RNA contains uracil;
DNA contains thymine.
A friend of yours appears to have put on a lot of muscle very quickly. At
the same time, you notice that your friend seems to have a lot of mood
swings and appears depressed. It is reasonable for you to suspect that
your friend has begun to take ______. - ANSWER- an ANABOLIC
STEROID
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