Question and Answer Samples and Techniques Biochemistry Quiz Question and Answer Samples and Techniques

Which statement best explains why enzymes bind to specific substrates? An enzyme can be inhibited so its active site is altered An enzyme folds differently in the presence of different substrates Different amino acid sequences cause variations in the shapes of an enzyme’s active sites Enzyme-substrate binding is based on size so only large enzymes can bind to large substrates All of the above

Several of these molecules connected in a chain result in a/an- amino acid sugar nucleic acid starch all of the above

The monomers that make up proteins are amino acids fatty acids enzymes glycerols All of the above

Which is the most valid conclusion based on the graph? Raising the temperature always makes an enzyme work better Enzymes are not affected by temperature Enzyme function decreases after a certain favorable temp. Enzymes are not affected by temperature All of the above

Which statement best describes the function of nucleic acids? increases the rate of chemical reactions stores genetic information and helps to make proteins stimulates metabolism in all body cells activates secretion of body’s hormones all of the above

Large biological molecules are made up of smaller subunits Large biological molecules are made up of smaller subunits. What are these smaller subunits called monomers polymers enzymes cells all of the above

Which of the following is not a lipid cholesterol wax cellulose steroid all of the above

After a biological molecule is analyzed, it is discovered that the molecule is composed of several amino acids. Which of these identifies the biological molecule. monosaccharide lipid saturated fat protein all of the above

Beeswax is which of the following types of organic molecule? nucleic acid carbohydrate lipid protein all of the above

A biomolecule that is large, complex set of chains composed of alternating subunits called nucleotides which of these functions in the cell Storing genetic information Storing energy Catalyzing cellular reactions Building tissue All of the above

Which biomolecule’s function is least likely to be affected by the order of its single molecule units? starch DNA RNA protein all of the above

Many land plants store energy in starch Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces RNA chains amino acids lipids monosaccharides all of the above

In humans and other multicellular organisms, which substance plays a central role as an energy source protein carbohydrate DNA water All of the above

Which does a polymer most closely resemble chain Link in a chain intersection circle all of the above

Which is true about enzymes They can not change their shape After a reaction, they can not be reused They act on nonspecific, randomly chosen substrates They can speed up metabolic processes in the body all of the above

The diagram below illustrates a biochemical process that occurs in organisms. The substance labeled catalyst also is known by what other name? antibody ion enzyme Inorganic compound all of the above

How does the addition of heat affect the ability of an enzyme to help the sugar molecules form a bond? Heat changes the enzyme so that the sugar molecules can not longer bond Heat allows the sugar molecules to bond more quickely Heat provides places on the enzyme for other molecules to bond Heat changes the chemical composition of sugar so it no longer needs the enzyme All of the above

What is the relationship between monomers and polymers Monomers are subunits of polymers Monomers are macromolecules; polymers are micromolecules Monomers are long, connecting chains of polymers Monomers are larger, more complex versions of polymers All of the above