Biology (Energy Drinks)

What property of phospholipids makes them suitable for the formation of the double layer found in membranes? A. They are uncharged. B. They can interact with proteins. C. They are composed of fatty acids. D. They have both a hydrophobic and a hydrophilic end.

D. They have both a hydrophobic and a hydrophilic end.

Which one of the following is a main function of many proteins? A. genetic coding B. energy source C. detoxification D. enzymatic activity

D. enzymatic activity

Which of the following is an example of a dehydration synthesis reaction? A. glycogen forming glucose molecules B. amylose breaking down to form maltose molecules C. proteins breaking down to form amino acids D. nucleotides forming DNA

D. nucleotides forming DNA

Which of the following statements describes the correct flow of energy conversions through living systems? A. Chloroplasts convert solar energy to the chemical energy of nutrient molecules. B. Mitochondria capture solar energy and convert it to oxygen. C. Chloroplasts produce CO2 and H2O during photosynthesis. D. Mitochondria convert ATP molecules into glucose.

A. Chloroplasts convert solar energy to the chemical energy of nutrient molecules.

Which of the following provides support for the endosymbiotic theory? A. Mitochondria and chloroplasts have their own genomes. B. Mitochondria and chloroplasts have only a single membrane surrounding them. C. Mitochondria and chloroplasts cannot synthesize proteins. D. Mitochondria and chloroplasts contain genes that are vastly different compared to bacterial genes.

A. Mitochondria and chloroplasts have their own genomes.

Which of the following is a function of the digestive system? A. absorb nutrients B. search out and destroy foreign substances, including viruses and bacteria C. make nitrogenous waste D. make hemoglobin E. transmit hormonal messengers throughout the body

A. absorb nutrients

If we set up an experimental design to explore the full digestion of starch to glucose, we would need to include which enzymes? A. amylase and maltase B. trypsin and maltase C. pepsin and lipase D. pepsin and hydrochloric acid

A. amylase and maltase

Select the correct association. A. carbohydrates—provide the body with an immediate source of energy B. carbohydrates—composed of amino acids bound together with peptide bonds C. proteins—have three forms: monosaccharides, disaccharides, and polysaccharides D. lipids—structural components of hair, fingernails, and claws

A. carbohydrates—provide the body with an immediate source of energy

Which of the following statements describes the correct flow of energy conversions through living systems? A. Chloroplasts produce carbon dioxide and water during photosynthesis, which in turn is used by mitochondria to generate ATP molecules. B. Chloroplasts convert solar energy to the chemical energy of nutrient molecules and mitochondria convert this chemical energy into ATP molecules used for work. C. Mitochondria capture solar energy and convert it to oxygen. Oxygen is used by chloroplasts to generate ATP molecules. D. Chloroplasts generate chemical energy in the form of ATP molecules and mitochondria convert ATP molecules into glucose to be used for work.

B. Chloroplasts convert solar energy to the chemical energy of nutrient molecules and mitochondria convert this chemical energy into ATP molecules used for work.

Which of the following statements is true concerning enzymatic activity? A. As the temperature increases, most enzymatic reactions will still proceed at the same rate. B. Each enzyme has a preferred pH at which the enzyme reaction rate is highest. C. Below a certain temperature, an enzyme will become denatured. D. Temperature has no impact on enzymatic activity.

B. Each enzyme has a preferred pH at which the enzyme reaction rate is highest.

Which of the following is a passive mechanism used to move materials into and out of of the cell? A. feedback inhibition B. facilitated diffusion C. active transport D. exocytosis

B. facilitated diffusion

Each enzyme has a particular substrate because enzymes A. increase the energy of activation. B. have active sites complementary in shape to their substrates. C. always require coenzymes. D. decrease the productivity of the cell.

B. have active sites complementary in shape to their substrates.

Which of the following is a true statement about proteins? A. Even small changes in temperature and pH will immediately destroy a protein's shape and function. B. Extra proteins are stored in the liver and brain. C. Proteins are made up of amino acids bonded together. D. Proteins are used to produce ATP for the cell.

C. Proteins are made up of amino acids bonded together.

In which of the following is the correct monomer matched with its polymer? A. glycerol—carbohydrate B. fatty acid—protein C. amino acid—protein D.monosaccharide—lipid

C. amino acid—protein

The plasma membrane is a thin sheet of lipid embedded with A. nucleotides B. carbohydrates C. proteins D. polymers

C. proteins