Biology 100: Exam 2 Study Guide for Finals

Imagine a balloon is made from a membrane that is permeable to water but NOT sucrose molecules. How would the balloon be affected if it is filled with a 50% surcose solution and then placed in a beaker of water? A: The balloon would get larger as it gains water B: The balloon would not change in size or volume C: The balloon would eventually burst D: The balloon would get smaller as it loses water

A

Which molecule results from the process of fermentation? A: NAD+ B: NADH C: NADPH D: ADP

A

If Erin would like to make a stir fry with an unsaturated fat, which fat would be suggested by Sam? A: Lard B: Olive Oil C: Butter D: Margarine

B

If you ate a piece of toast covered with butter, which macromolecule components would result after your body breaks down the food? A: amino acids and glycerol B: monosaccharides and amino acids C: fatty acids, amino acids, and polysaccharides D: glycerol, fatty acids, and monosaccharides

B

What does recent research suggest about the relationships between weight and health risks? A: People of normal weights have the lowest health risks B: People who are slightly overweight have the lowest health risks C: People who are underweight have the highest health risks D: People who ate moderately obese have the highest health risks

B

What is the function of the plasma membrane in a photosynthetic eukaryotic cell? A: It recycles old extracellular material. B: It isolates the cell's contents from the external environment. C: It converts carbon dioxide and water into sugars. D: It controls protein synthesis in the cell.

B

Which organelle is found in plant cells but NOT in animal cells? A: mitochondrion B: chloroplast C: endoplasmic reticulum D: centriole

B

Which process creates the most ATP per glucose molecule metabolized? A: glycolysis B: anaerobic respiration C: aerobic cellular respiration D: fermentation

C

Carbohydrates are an excellent source of energy for the body. If a candy bar and a pear contain an equal number of calories from carbohydrates, which is a healthier food and why? A: The candy bar is healthier because it contains processed sugars, which provide a faster energy source. B: The candy bar is healthier because it contains preservatives that the pear lacks. C: The pear is healthier because it contains fewer chemical bonds to be broken during digestion. D: The pear is healthier because it contains more vitamins, minerals, and fiber.

D

How would the permeability of the phospholipid bilayer of plasma membranes be described? A: The bilayer is impermeable to all atoms and molecules B: The bilayer is always impermeable to small molecules C: The bilayer is always permeable to charged atoms and molecules D: The bilayer is differentially permeable

D

What happens to the lactic acid created during fermentation in human muscle cells? A: It donates a phosplate to ADP to recharge ATP B: It joins with electrons and hydrogen ions to form water C: It is directly converted into ATP D: It goes to the liver where it is converted into pyruvic acid

D

What would happen if activation energy barriers didn't exist? A: Substrates would not bind properly to enzymes B: Coenzymes would not work, but enzyme function would not be affected C: Chemical reactions in the body would never occur D: All chemical reactions in the body would proceed whether they were needed or not

D