Biology 121 Final Exam ACTUAL
UPDATED Exam Questions and
CORRECT Answers
What is the hierarchy of life from largest to smallest? - CORRECT ANSWER - Biosphere-
Ecosystem-Community-Population-Organism-Organ system-Organ-Tissue-Cells-Organelle-
Molecule-Atom
A current example of natural selection is - CORRECT ANSWER - The bacteria that has
become drug resistant
The usual process for the scientific method is: - CORRECT ANSWER - Observation-
question-hypothesis-prediction-experiment-results-conclusion
Starch is a reserve polysaccharide made up of _____ subunits - CORRECT ANSWER -
Gluclose
Monosaccharides are to polysacharides as ______ are to _______ - CORRECT ANSWER -
Amino acids; proteins
All organic molecules contain: - CORRECT ANSWER - Carbon
In polar covalent bonding, electrons are ______ ______ between two atoms - CORRECT
ANSWER - shared unequally
I have an element alpha with an atomic number of 10 and I have another element beta with the
same number of protons but has 3 more neutrons than alpha. What is the atomic number of beta?
- CORRECT ANSWER - 10
, What organelles are involved in energy conversion? - CORRECT ANSWER - Mitochondrion
and chloroplast
Two molecules contain the exact same elements but are arranged differently what is this called? -
CORRECT ANSWER - Isomer
Why is one side of a water molecule practically negative while the other side is practically
positive? - CORRECT ANSWER - Uneven sharing of electron pairs occurs due to the strong
pull of oxygen.
Looking at the reaction above what type of reaction forms a triglyceride? - CORRECT
ANSWER - Dehydration synthesis reactions
Which of the following dietary fats is considered to be the healthiest? - CORRECT
ANSWER - Unsaturated cis fat
The structure of cholesterol is similar to the structure of: - CORRECT ANSWER - Sex
hormones
The graph is showing the differences in _____ between a chemical reaction with and without
enzymes - CORRECT ANSWER - Activation energy
Which structure selectively regulates the transport of substances into and out of a planet cell? -
CORRECT ANSWER - The plasma membrane
What is the role of the protein component of chromatin? - CORRECT ANSWER - Something
small and charged, like Mg ion
You have two beakers in front of you labled A and B. One beaker contains Sodium Chloride and
the other contains crystalized triglyceride. You cannot tell them visually apart. You then take a
subsample from beaker A and place it in water. The substance dissolves. The substance in
Beaker B does not dissolve which beaker contains salt? - CORRECT ANSWER - Beaker A
UPDATED Exam Questions and
CORRECT Answers
What is the hierarchy of life from largest to smallest? - CORRECT ANSWER - Biosphere-
Ecosystem-Community-Population-Organism-Organ system-Organ-Tissue-Cells-Organelle-
Molecule-Atom
A current example of natural selection is - CORRECT ANSWER - The bacteria that has
become drug resistant
The usual process for the scientific method is: - CORRECT ANSWER - Observation-
question-hypothesis-prediction-experiment-results-conclusion
Starch is a reserve polysaccharide made up of _____ subunits - CORRECT ANSWER -
Gluclose
Monosaccharides are to polysacharides as ______ are to _______ - CORRECT ANSWER -
Amino acids; proteins
All organic molecules contain: - CORRECT ANSWER - Carbon
In polar covalent bonding, electrons are ______ ______ between two atoms - CORRECT
ANSWER - shared unequally
I have an element alpha with an atomic number of 10 and I have another element beta with the
same number of protons but has 3 more neutrons than alpha. What is the atomic number of beta?
- CORRECT ANSWER - 10
, What organelles are involved in energy conversion? - CORRECT ANSWER - Mitochondrion
and chloroplast
Two molecules contain the exact same elements but are arranged differently what is this called? -
CORRECT ANSWER - Isomer
Why is one side of a water molecule practically negative while the other side is practically
positive? - CORRECT ANSWER - Uneven sharing of electron pairs occurs due to the strong
pull of oxygen.
Looking at the reaction above what type of reaction forms a triglyceride? - CORRECT
ANSWER - Dehydration synthesis reactions
Which of the following dietary fats is considered to be the healthiest? - CORRECT
ANSWER - Unsaturated cis fat
The structure of cholesterol is similar to the structure of: - CORRECT ANSWER - Sex
hormones
The graph is showing the differences in _____ between a chemical reaction with and without
enzymes - CORRECT ANSWER - Activation energy
Which structure selectively regulates the transport of substances into and out of a planet cell? -
CORRECT ANSWER - The plasma membrane
What is the role of the protein component of chromatin? - CORRECT ANSWER - Something
small and charged, like Mg ion
You have two beakers in front of you labled A and B. One beaker contains Sodium Chloride and
the other contains crystalized triglyceride. You cannot tell them visually apart. You then take a
subsample from beaker A and place it in water. The substance dissolves. The substance in
Beaker B does not dissolve which beaker contains salt? - CORRECT ANSWER - Beaker A
