EXAM QUESTIONS AND
ANSWERS 2024/2025
Carbon-12, Carbon-13, and Carbon-14 are all examples of _____________________ of the element
Carbon. - ANS >>isotopes
The covalent bonds connecting monomer units in sugars can be formed by the removal of a water
molecule in a reaction known as a ______________________ reaction. - ANS >>dehydration
Matter is composed of ____________________. - ANS >>atoms
Macromolecules that are used by most organisms to store hereditary information are called
____________________ molecules. - ANS >>DNA
Protons and ___________________ are found _____________________ the nucleus of an atom. - ANS
>>neutrons, inside
The method of reasoning that uses construction of general principles by careful examination of many
specific cases is __________________________ reasoning. - ANS >>inductive
Water molecules are ________________________ with ends that exhibit partial positive and negative
charges that allow the water molecules to attract each other through ________________________. -
ANS >>polar, hydrogen bonds
The types of bonds linking nucleotides in nucleic acids are _________________________ bonds. - ANS
>>phosphodiester
Agricultural researchers hypothesize that the use of additional minerals will increase the fruit yield of
local tomato plants. To test this question, they set up 2 groups. In the 1st container, minerals are added
to the water given to the plants. This is referred to as the variable. In the 2nd container researchers did
not add any minerals to it, referring to the plain water as the control. Plants are then grown, some with
, the mineral enhanced water and others with plain water and the number of tomatoes harvest from the
plants are documented. Would this be a valid experiment? - ANS >>Yes because there is only 1 variable
and a control.
__________________________ RNA is used as a template for the translation of proteins. - ANS
>>Messenger
You arrive late to class one morning. As you enter the classroom, you hear Mrs. Hogan referring to the
"five-prime end" and the "three-prime end" of a macromolecule. You breathe a sigh of relief because
you know she is teaching the class about __________________________. - ANS >>DNA
A DNA molecule containing 28% thymine would contain _____% cytosine, _____% guanine, and _____%
adenine. - ANS >>22, 22, 28
Negatively charged subatomic particles that have almost no mass and are found outside of the nucleus
are __________________________. - ANS >>electrons
When 2 atoms share the transfer of groups of electrons, the bonding is referred to as covalent bonding.
(T/F) - ANS >>False
DNA and RNA contain functional units known as _____________________. - ANS >>nucleotides
Proteins are polymers formed of structural units called ___________________________. - ANS >>amino
acids
Match each of the following carbohydrate types to their example location.
a - starch
b - fructose
c - glycogen
d - glucose - ANS >>a - a potato storing energy in a tuber
b - apple tree storing energy in fruit
c - human storing energy in muscle cells