Which of the following is NOT true about lipids? (1 point)
Lipids are fats and oils.
Lipids are polymers.
Lipids are macromolecules.
Lipids are made up of fatty acids and glycerol.
Lipids are polymers.
Use the chart to answer the following question.
Biomolecule Elements Function
Protein C, H, O Used for short term energy
Lipids C, H, O Used by the body for grown
and repair
Nucleic Acids C, H, O, N,
P
Used to store and transmit
genetic information
Carbohydrate C, H. O, N Used to control the rate of
reactions and regulate cell
processes
Which molecule in the chart above is paired with its correct
elements and function?
(1 point)
Lipids
Carbohydrates
Nucleic Acids
Proteins
Lipids are paired with their correct elements and function in the chart.
The digestion of food involves the body’s use of enzymes to
assist in breaking down organic compounds. The following
chart illustrates the amount of time necessary for protein
digestion in varying conditions.
Digestion Rates or Protein
Reaction Seconds
Protein only 60
Protein + Acid 30
Protein + Acid + Enzyme 10
This chart provides evidence that enzymes
(1 point)
dissolve in water
slow down chemical reactions
speed up chemical reactions
maintain a specific pH
This chart provides evidence that enzymes speed up chemical reactions.
In 1931, a chemist named Arthur Fox was pouring some
powdered PTC (phenylthiocarbamide) into a bottle when
some of the powder accidentally blew into the air. A
colleague standing nearby complained that the dust tasted
bitter. Fox tasted nothing at all. Curious how they could be
tasting the chemical differently, they tasted it again. The
results were the same. Fox had his friends and family try the
chemical then describe how it tasted. Some people tasted
nothing. Some found it intensely bitter, and still others
thought it tasted only slightly bitter (from The University of
Utah Genetic Science Learning Center, 2013). It is
estimated that 70% of the population can taste PTC and 30%
cannot. We also know that the ability to taste PTC is passed
from parent to child.
Which of the following molecules is responsible for the fact
that parents who can taste PTC will most often have children
who can taste PTC?
(1 point)
Nucleic Acids
Lipids
Carbohydrates
Proteins