BIO 1021 Exam 1 || All Questions Answered Correctly.
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BIO 1021
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BIO 1021
The fundamental unit of life is the correct answers e. cell.
Heterotrophs obtain their energy from correct answers c. other organisms.
The initial accumulation of oxygen in the atmosphere was the result of photosynthesis from an organism most like modern correct answers a. cyanobacteria (blue...
BIO 1021 Exam 1 || All Questions Answered Correctly.
The fundamental unit of life is the correct answers e. cell.
Heterotrophs obtain their energy from correct answers c. other organisms.
The initial accumulation of oxygen in the atmosphere was the result of photosynthesis from an
organism most like modern correct answers a. cyanobacteria (blue green algae).
Ozone is important to life on Earth because it correct answers c. blocks much ultraviolet
radiation.
Eukarya include correct answers e. All of the above
The part of the atom that determines how the atom behaves chemically is the correct answers b.
electron.
Because atoms can have the same number of protons but a different number of neutrons,
elements have correct answers a. isotopes.
All except _______ follow the octet rule. correct answers d. hydrogen
What is the difference between covalent and ionic bonds? correct answers e. Covalent bonds are
the sharing of electrons between atoms, whereas ionic bonds are the transfer of electrons from
one atom to another.
Sweating is a useful cooling device for humans because water correct answers a. takes up a great
deal of heat in changing from its liquid state to its gaseous state.
What is the difference between an acid and a base? correct answers e. An acid releases H+ ions
in solution, whereas a base accepts H+ ions.
Cholesterol is composed primarily of carbon and hydrogen atoms. Which property would you
expect cholesterol to have? correct answers a. It is insoluble in water.
The functional group written as —COOH is called the _______ group. correct answers e.
carboxyl
Surface tension and capillary action occur in water because it correct answers c. has hydrogen
bonds.
In condensation (dehydration) reactions, the atoms that make up a water molecule are derived
from correct answers c. both of the reactants.
You have isolated an unidentified liquid from a sample of peanuts. You add the liquid to a
beaker of water and shake vigorously. After a few minutes, the water and the other liquid
, separate into two layers. To which class of large biological molecules does the unknown liquid
most likely belong? correct answers b. Lipids
You look at the label on a container of shortening and see "hydrogenated vegetable oil." This
means that during processing the number of carbon-carbon double bonds in the oil was
decreased. What is the result of decreasing the number of double bonds? correct answers b. The
oil is now a solid at room temperature.
The portion of a phospholipid that contains the phosphorous group has one or more electric
charges. That makes this region of the molecule correct answers b. hydrophilic.
In a biological membrane, the phospholipids are arranged with the fatty acid chains facing the
interior of the membrane. As a result, the interior of the membrane is correct answers a.
hydrophobic.
Glucose and fructose both have the formula C6H12O6, but the atoms in these two compounds
are arranged differently. Glucose and fructose are known as correct answers a. isomers.
A nucleotide contains a pentose sugar, a phosphate group, and a(n) correct answers c. nitrogen-
containing base.
In animals, carbohydrate is stored in the form of correct answers c. glycogen.
The primary structure of a protein is determined by its correct answers c. sequence of amino
acids.
When a protein loses its three-dimensional structure and becomes nonfunctional, it is correct
answers c. denatured.
The _______ structure of a protein concerns the way separate polypeptides are assembled
together. correct answers d. quaternary
Miller-Urey showed that in any environment with conditions similar to those of Earth, correct
answers a. inorganic molecules would react to form organic molecules.
Lipids such as cholesterol are synthesized by correct answers c. the SER (smooth endoplasmic
reticulum).
What is the major distinction between prokaryotic and eukaryotic cells? correct answers a. A
prokaryotic cell does not have a nucleus, whereas a eukaryotic cell does.
Which of the following is (are) found in prokaryotic cells? correct answers d. Ribosomes
Which of the following is a general function of all cellular membranes? correct answers a. They
regulate which materials can cross the membrane.
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