Biology 1610 FINAL USU 2022/2023 (Questions And A nswers)
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Biology 1610
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Biology 1610
The most common isotope of hydrogen has one proton, no neutrons, and one electron. An isotope of hydrogen with 1 neutron would have:
an atomic number of 1 and a mass number of 2
In a covalent bond:
electrons are shared between atoms so that all atoms have full outer shells
A property ...
biology 1610 final usu 20222023 questions and a nswers
final usu 20222023 questions and a nswers
the most common isotope of hydrogen has one proton
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BIOLOGY 1610 FINAL USU
The most common isotope of hydrogen has one proton, no neutrons, and one electron. An isotope of
hydrogen with 1 neutron would have: - ANSWERan atomic number of 1 and a mass number of 2
In a covalent bond: - ANSWERelectrons are shared between atoms so that all atoms have full outer
shells
A property of a system that is present at one level of organization but absent at the levels below is
called: - ANSWERan emergent property
An ionic bond is - ANSWERweaker than a covalent bond
Modern taxonomy attempts to group organisms according to: - ANSWERevolutionary history
The half-life of carbon 14 is 5,730 years. If you have a piece of wood in which 2% of the carbon is carbon-
14, and you bury it underground. Which of the following statements is TRUE? - ANSWERAfter 5,730
years, 1% of the carbon would be carbon-14.
Nitrogen has an atomic number of 7. This means that: - ANSWERnitrogen has 3 electrons missing from
its outer shell
The best description of the bond that binds hydrogen and oxygen together to create a water molecule
is: - ANSWERa polar covalent bond
The annual temperature range of Logan is larger than that of San Francisco largely because: -
ANSWERwater has a high specific heat
,Ice floats because: - ANSWERhydrogen bonding forces water molecules apart when water freezes
Which of the following statements about hydrogen bonds is FALSE?
1. In a hydrogen bond, carbon and hydrogen are positively charged because they attract electrons
weakly.
2. Hydrogen bonds can form between two molecules.
3. Hydrogen bonds are formed when hydrogen shares electrons to form an ionic bond.
4. In a hydrogen bonds, oxygen and nitrogen are negatively charged because they attract electrons
strongly.
5. Hydrogen bonds are much weaker than covalent bonds. - ANSWERHydrogen bonds are formed when
hydrogen shares electrons to form an ionic bond.
A solution with 10 times more hydrogen ions than a solution with a pH of 5 would have a pH of: -
ANSWER4
A prion is a: - ANSWERProtein
Which of the following is a polymer of glucose?
1. glycogen
2. glycerol
3. a monosaccharide
4. a polypeptide chain
5. sucrose - ANSWERglycogen
Unsaturated fats:
1. are produced mainly by animals
2. contain only two fatty acids
,3. are generally liquid at room temperature
4. do not contain fatty acids
5. do not contain glycerol - ANSWERare generally liquid at room temperature
Phospholipids form bilayers because:
1. the fatty acids contain phosphates instead of hydrogens
2. phospholipids are polymers of fatty acids
3. the entire molecule is hydrophobic
4. one end of the molecule is hydrophobic; the other end is hydrophilic
5. they hydrogen bond with water which holds them in straight lines - ANSWERone end of the molecule
is hydrophobic; the other end is hydrophilic
A nucleotide is made up of:
1. a central carbon and an R group
2. a sugar, an amino group, and a nitrogenous base
3. amino acids attached to one another
4. a carboxyl group, an an amino group, and an R group
5. a sugar, a phosphate, and a nitrogen-containing base - ANSWERa sugar, a phosphate, and a nitrogen-
containing base
Which of the following statements about protein structure is TRUE?
1. An alpha-helix is an example of tertiary structure
2. Tertiary structure is determined by interactions among R-groups.
3. All proteins have quaternary structure.
4. A pleated sheet is an example of primary structure.
, 5. The same protein can have different primary structures - ANSWERTertiary structure is determined by
interactions among R-groups.
Which of the following statements about polymers is TRUE?
1. Polymers of carbohydrates are formed by a dehydration reaction.
2. A protein is a polymer of nucleic acids
3. A monomer is a long molecule made up of repeated units called polymers.
4. All biological molecules are made up of polymers.
5. A nucleic acid is a polymer of amino acids. - ANSWERPolymers of carbohydrates are formed by a
dehydration reaction.
An amino acid contains:
1. an amino group and a phosphate group
2. an amino group and a carboxyl group
3. a sugar and a nitrogen-containing base
4. a phosphate group and a carboxyl group
5. an amino group and a sugar - ANSWERan amino group and a carboxyl group
Which of the following statements about cellulose is TRUE?
1. Plants use cellulose primarily for energy storage.
2. Cellulose is a polymer of amino acids
3. Cellulose forms helices
4. Animals store energy as cellulose
5. The primary function of cellulose is support - ANSWERThe primary function of cellulose is support
Starch and cellulose have different properties because:
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