BIOL 1441 Exam Modules 1-4 Questions With Complete
Solutions
A cell can use the process of facilitated diffusion to Correct
Answers move ions or large polar molecules from a region of
high concentration to a region of low concentration.
A covalent bond is likely to be polar when Correct Answers
one of the atoms sharing electrons is more electronegative than
the other atom
About 25 of the 92 natural elements are known to be essential to
life. Which 4 of these 25 elements make up approximately 96%
of living matter? Correct Answers carbon, hydrogen, nitrogen,
oxygen
All lipids are Correct Answers hydrophobic
Bonds between two atoms that are equally electronegative are
Correct Answers Nonpolar Covalent Bonds
Examination of a cell by transmission electron microscopy
reveals a high density of ribosomes in the cytoplasm. This
observation suggests that this cell is actively producing large
amounts of which of the following molecules? Correct Answers
Proteins
For the following questions, match the labeled component of the
cell membrane in the figure with its description.
, Which component in the accompanying figure is cholesterol?
Correct Answers E
How do phospholipids interact with water molecules? Correct
Answers The polar heads interact with water; the nonpolar tails
do not.
How is DNA linked to the production of proteins? Correct
Answers DNA holds the instructions for the cells on how to
make proteins.
How many layers of phospholipids make up the plasma
membrane? Correct Answers 2
Identify the prokaryotic organism. Correct Answers Bacteria
If a cell had a damaged central vacuole, it would have difficulty
performing what function? Correct Answers Storing Water
In a chemical reaction, the element 13Al will most preferably
Correct Answers lose three electrons and become positively
charged
Organic compounds are distinguished by molecules that contain
________ bonded to other elements. Correct Answers Carbon
Refer to the following figure (first three rows of the periodic
table) to answer the questions below.
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