Of the following molecules, which one contains almost all carbon and hydrogen, making it highly hydrophobic?A. Glycerol
B. Nucleic Acid
C. Fatty
... [Show More] Acid
D. Amino Acid
E. Monosaccharide
Ans. [C. Fatty Acid]
Humans consume carbohydrates, fats, and proteins in our diets, and fats have the largest proportion of calories per gram of mass. Calories are a unit of biologically-available energy. Fats have more potential energy than proteins or carbohydrates because: A. Some bonds in carbohydrates and proteins cannot be broken
B. Lipid molecules are more dense than carbohydrate or protein molecules
C. Lipids can be stored as fats
D. Fats have more bonds that can be broken, especially in the fatty acid chains
E. The process of producing and refining our foods is much more efficient for lipids
Ans. [D. Fats have more bonds that can be broken, especially in the fatty acid chains]
The reaction that polymerizes monomers into biomolecule polymers is: A. Dehydration synthesis
B. Peptide bonding
C. Different for each macromolecules monomers
D. Hydrolysis
E. Hydrogen Bonding
Ans. [A. Dehydration Synthesis]
DNA normally occurs in two strands, which are held together by _____ bonds. A. Ionic
B. Hydrogen
C. Phosphodiester
D. Nucleotide
E. Van der Waals
Ans. [B. Hydrogen]
Suppose you have a mild case of eczema, a non-contagious skin disorder. When triggered, it results in patches of itchy, dry skin. In the past, you have noticed that stress and skin contact with certain detergents and cleaning products can trigger your eczema. One December day, you notice a patch of eczema on your arm. Finals are coming up, and you're stressed studying for exams. You also just started using a new laundry detergent.
When finals end, your stress levels return to normal, and you stop using the new laundry detergent. A week later you notice that your eczema rash is improving. You conclude that the eczema was triggered by both stress and the new detergent. Why should you avoid attributing your eczema to both stress and the new detergent? A. Because both potential causative agents of the eczema were relieved at the same time you can't say for certain what caused it.
B. Because stress is difficult to quantify, concluding that it caused anything is problematic.
C. There is no reason to avoid drawing the above conclusion, given the information provided.
D. Because detergent directly comes into contact with your skin, it likely has a larger influence on skin disorder than does stress.
Ans. [A. Because both potential causative agents of the eczema were relieved at the same time you can't say for certain what caused it.]
The fundamental method that biologists use to organize living organisms is: A. how many genes an organism has
B. Relationships between organisms sharing the same physical habitat
C. Whether the organisms are motile or not
D. The complexity or organisms, from cells to tissue to organisms, and so on.
E. Evolutionary trees.
Ans. [E. Evolutionary trees]
Which of the properties below are unique to (found only in) living things? Choose all that apply A. Matter Processing
B. Composed of at least one cell
C. Faithful self-replication
D. Homeostasis
E. Organization
F. Development
G. Growth
Ans. [A. Matter Processing | B. Composed of at least one cell | E. Organization]
There are ____ Domains in biology: A. Five: Animals, plants, protists, fungi, and bacteria
B. Four: Bacteria, plants, animals, and fungi
C. Three: Bacteria, Archaea, Eukarya
D. Three: Bacteria, Archaea, Prokarya
Ans. [C. Three: Bacteria, Archaea, Eukarya]
In sciences, a "proposed explanation" for a natural phenomenon is a A. Theory
B. Fact
C. Experiment
D. Hypothesis
E. Conclusion
Ans. [D. Hypothesis]
The hydrolysis reaction (choose all that apply): A. Breaks apart water
B. Breaks apart polypeptides
C. Breaks apart polysaccharides
D. Joins two monomers with a covalent bond
E. Forms a glyosidic bond in carbohydrates
F. Is irreversible
G. Requires water as a reactant
H. Results in water as a product
Ans. [All are correct except A.]
Glucose and Ribose: A. Are both monosaccharides
B. Are both polysaccharides
C. Have the same number of carbons
D. None of these are true
E. Are both found in nucleic acids
Ans. [A. Are both monosaccharides]
Which of these fatty acids do you expect to be liquid at room temperature? A. Cis unsaturated fatty acid
B. Trans unsaturated fatty acid
C. Saturated fatty acid
D. A and B
E. B and C
Ans. [A. Cis unsaturated fatty [Show Less]