BSC1010 FINAL EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED RATED
100% PASS
Enzyme Z catalyzes a reaction that transforms a substrate called ZEE into a product called ZED. Enzyme
Z is regulated by two different inhibitor molecules called inhibitor W and inhibitor X. The shape of
inhibitor W is very similar to the shape of ZEE while the shape of inhibitor X is completely different
from ZEE, ZED, or inhibitor W. t inhibitor molecules called inhibitor W and inhibitor X. The shape of
inhibitor W is very similar to the shape of ZEE while the shape of inhibitor X is completely different
from ZEE, ZED, or inhibitor W.
Which of these inhibitors (W or X) is likely to be a competitive inhibitor of enzyme Z?
Inhibitor W
Testosterone/estradiol is a steroid hormone. Would it dissolve in water? Why or why not?
No, because it's a lipid and lipids are hydrophobic
If you grow cells in the presence of radioactive phosphate, which biomolecules would become
radioactive?
,Phospholipids and nucleotides/nucleic acids would become radioactive because these are the biological
molecules that contain phosphate/phosphorus.
Which elements would most easily replace carbon in a small biological molecule? why?
Silicon as it has 4 valence electrons just like carbon therefore it could form 4 bonds like carbon.
Which of the following elements would most likely form an ionic bond? Carbon, Nitrogen, Neon,
Fluorine, Chlorine and why?
Fluorine because it has 7 electrons in its valence shell and only needs to get one more to be satisfied
with a full outer shell.
Of the 7 different functional which is an acid?
Carboxyl is an acid because it gives up a H+ in a aqueous solution to become negatively charged
Which of the 7 functional groups that we learned about is defined as a base?
Amino, because it takes an H+ from the aqueous solution to become positively charged.
The two molecules levocetirizine and cetirizine are mirror images of each other (enantiomers). Both
are antihistamines but have different side-effects. Cetirizine causes mild drowsiness as it is able to
cross the blood brain barrier. While Levocetirizine does not cause drowsiness because it does not
enter the brain. Briefly explain how these two molecules that have the same molecular formula could
have different effects on the body.
They have different shapes which means they will fit differently with biological molecules which leads to
different interactions and effects in the body. One may cause a biological function such as binding to a
receptor while the other cannot because of its shape.
, Atorvastatin a drug used to prevent cardiovascular disease. There are four different optical isomers (or
enantiomers) of the same molecule. Only one enantiomer can be safely used as a treatment because
the other enantiomers cause adverse side effects. Explain why these molecules with the same formula
would have different effects in the body.
They have different shapes which means they will fit differently with biological molecules which will lead
to different interactions.
What is the primary function of carbohydrates for living in organisms?
energy storage
Which of the following atoms (hydrogen, oxygen, and carbon) are the most electronegative?
Oxygen
What type of bonds build secondary structure of a protein?
hydrogen bonds
Molecular mass is calculated by adding ups the atomic mass of all of the atoms in the molecule. Out of
Glucose, lactose, and Cellulose which has the smallest molecular mass and which has the largest?
Smallest is glucoses and largest is cellulose.
Which type of molecule is a major component of vegetable oil?
Unsaturated fat
Out of: Glucose, nucleotides, amino acids, and cholesterol. Which biomolecules only contain C, H, and
O
Glucose and Cholesterol
WITH COMPLETE SOLUTIONS VERIFIED RATED
100% PASS
Enzyme Z catalyzes a reaction that transforms a substrate called ZEE into a product called ZED. Enzyme
Z is regulated by two different inhibitor molecules called inhibitor W and inhibitor X. The shape of
inhibitor W is very similar to the shape of ZEE while the shape of inhibitor X is completely different
from ZEE, ZED, or inhibitor W. t inhibitor molecules called inhibitor W and inhibitor X. The shape of
inhibitor W is very similar to the shape of ZEE while the shape of inhibitor X is completely different
from ZEE, ZED, or inhibitor W.
Which of these inhibitors (W or X) is likely to be a competitive inhibitor of enzyme Z?
Inhibitor W
Testosterone/estradiol is a steroid hormone. Would it dissolve in water? Why or why not?
No, because it's a lipid and lipids are hydrophobic
If you grow cells in the presence of radioactive phosphate, which biomolecules would become
radioactive?
,Phospholipids and nucleotides/nucleic acids would become radioactive because these are the biological
molecules that contain phosphate/phosphorus.
Which elements would most easily replace carbon in a small biological molecule? why?
Silicon as it has 4 valence electrons just like carbon therefore it could form 4 bonds like carbon.
Which of the following elements would most likely form an ionic bond? Carbon, Nitrogen, Neon,
Fluorine, Chlorine and why?
Fluorine because it has 7 electrons in its valence shell and only needs to get one more to be satisfied
with a full outer shell.
Of the 7 different functional which is an acid?
Carboxyl is an acid because it gives up a H+ in a aqueous solution to become negatively charged
Which of the 7 functional groups that we learned about is defined as a base?
Amino, because it takes an H+ from the aqueous solution to become positively charged.
The two molecules levocetirizine and cetirizine are mirror images of each other (enantiomers). Both
are antihistamines but have different side-effects. Cetirizine causes mild drowsiness as it is able to
cross the blood brain barrier. While Levocetirizine does not cause drowsiness because it does not
enter the brain. Briefly explain how these two molecules that have the same molecular formula could
have different effects on the body.
They have different shapes which means they will fit differently with biological molecules which leads to
different interactions and effects in the body. One may cause a biological function such as binding to a
receptor while the other cannot because of its shape.
, Atorvastatin a drug used to prevent cardiovascular disease. There are four different optical isomers (or
enantiomers) of the same molecule. Only one enantiomer can be safely used as a treatment because
the other enantiomers cause adverse side effects. Explain why these molecules with the same formula
would have different effects in the body.
They have different shapes which means they will fit differently with biological molecules which will lead
to different interactions.
What is the primary function of carbohydrates for living in organisms?
energy storage
Which of the following atoms (hydrogen, oxygen, and carbon) are the most electronegative?
Oxygen
What type of bonds build secondary structure of a protein?
hydrogen bonds
Molecular mass is calculated by adding ups the atomic mass of all of the atoms in the molecule. Out of
Glucose, lactose, and Cellulose which has the smallest molecular mass and which has the largest?
Smallest is glucoses and largest is cellulose.
Which type of molecule is a major component of vegetable oil?
Unsaturated fat
Out of: Glucose, nucleotides, amino acids, and cholesterol. Which biomolecules only contain C, H, and
O
Glucose and Cholesterol
