Bio Final Unit Quiz Flashcards
All chapters
What happens as water freezes and becomes ice?
a. Water molecules crowd together more to form a more stable crystal structure.
b. Hydrogen bonds between the water molecules all break apart as water freezes.
c. Water molecules move farther apart from one another to make stable hydrogen bonds.
d. Covalent bonds within each individual water molecule all break as the temperature decreases.
Water molecules move farther apart from one another to make stable hydrogen bonds.
If the hydrogen ion (H+) concentration of the solution is 1 x 10-8 M, then what is the pH of that solution?
a. pH is 6
b. pH is 14
c. pH cannot be determined with information given.
d. pH is 8
pH is 8
Which statement is true about isotopes?
a. Atoms (of the same element) have different numbers of protons.
b. Atoms (of the same element) have different numbers of neutrons.
c. Atoms (of the same element) have different numbers of nuclei.
d. Atoms (of the same element)have different number of electrons
Atoms (of the same element) have different numbers of neutrons.
What are the four major elements of life that make up living things?
a. Carbon, Hydrogen, Nitrogen, and Oxygen
b. Hydrogen, Iron, Carbon, and Calcium
c. Nitrogen, Hydrogen, Phosphorus, and Magnesium
Carbon, Hydrogen, Nitrogen, and Oxygen
What are the three domains of life?
a. Archaea, Prokarya, and Fungi
b. Bacteria, Animalia, and Eukarya
c. Eukarya, Bacteria, and Archaea
d. Animalia, Plantae, and Protista
Eukarya, Bacteria, and Archaea
How do polar covalent bonds form between the atoms of a molecule?
a. Unequal sharing of electrons between atoms.
b. Equal sharing of electrons between atoms.
c. Temporary unequal electron distributions between the atoms.
d. Transfer (giving/taking) of electrons between atoms.
Unequal sharing of electrons between atoms.
How does denaturation affect proteins and enzymes?
a. Denaturation enhances the activity of proteins and enzymes by modifying their physical structures.
b. Denaturation allows enzymes to bind to their protein substrates more easily.
c. Denaturation causes proteins and enzymes to change their shapes and lose their normal functions.
d. Denaturation will affect the shapes of proteins and enzymes, but it does not affect their functions at all.
Denaturation causes proteins and enzymes to change their shapes and lose their normal functions.
Which functional group is polar/hydrophilic and chemically basic (acts as a base)?
a. Methyl group
b. Sulfhydryl group
c. Carboxyl group
d. Amino group
Amino group
Which element serves as the “chemical backbone” of most biologically-relevant molecules (including macromolecules)?
a. Hydrogen
b. Carbon
c. Phosphorus
d. Sodium
Carbon
Which statement is correct about unsaturated lipids?
a. Unsaturated lipids contain at least one carbon-carbon double bond and have a “kink” in their shape.
b. Unsaturated lipids only contain carbon-carbon single bonds and don’t bend in shape.
c. Unsaturated lipids are chemically identical to trans-fats and behave in the same way.
d. Unsaturated lipids are typically solid at room temperature.
Unsaturated lipids contain at least one carbon-carbon double bond and have a “kink” in their shape.
Which level of protein structure describes the interactions between the amino acid side chains that result in the three-dimensional (3D) folding of the protein.
a. Primary structure
b. Tertiary structure
c. Secondary structure
d. Quaternary structure
Tertiary structure
Which is the final electron acceptor in the electron transport chain during oxidative phosphorylation?
a. Oxygen
b. Carbon dioxide
c. Water
d. NAD+
Oxygen
What is the input of the Krebs cycle/citric acid cycle? (Which molecules enter this stage?)
a. FADH2, CO2, and ATP
b. Pyruvate, oxygen, and NAD+
c. Glucose, NAD+, and water
d. NAD+, FAD, and acetyl CoA
NAD+, FAD, and acetyl CoA
Which statement correctly describes osmosis?
a.Diffusion of solutes across a selectively permeable membrane.
b. Diffusion of nonpolar molecules across a selectively permeable membrane.
c. Active transport of any polar molecule across a selectively permeable membrane.
d. Movement of water across a selectively permeable membrane.
Movement of water across a selectively permeable membrane.
What is the output of glycolysis? (Which molecules come out of this stage?)
a. ATP and water
b. Pyruvate, NADH, and ATP
c. FADH2, NADH, CO2, and ATP
d. Acetyl CoA, NADH, and CO2
Pyruvate, NADH, and ATP
