Which of the following elements is NOT present in carbohydrates?
a. carbon
b. oxygen
c. nitrogen
d. hydrogen
A useful model for enzyme action is the:
A. double helix model.
B. amino acid chain model.
C. ball and socket model.
D. the lock and key model.
0. Which of the following statements about enzymes is FALSE?
A. A given enzyme catalyses just one type of reaction.
B. While most enzymes are proteins, some are composed of RNA.
C. The activity of enzymes is typically impaired at high temperature.
D. Enzymes act to lower the activation energy of a reaction by
stabilizing the transition state, but do not participate chemically in
the reaction.
Which of the following statements about organic or inorganic compounds is false?
a. Scientists can synthesize organic compounds in the laboratory
b. Organic compounds always contain carbon
c. Living tissues are made up almost entirely of organic compounds
d. Inorganic compounds are not found inside living things
Which of the following is NOT a use of summarizing?
a. Reviewing a long text, speed , or video
b. Writing an abstract
c. Preparing notes for a study guide
d. Creating a blog
Which of these is an example of someone using the process of synthesis?
A. A scientist attempting to determine why sprinkling salt on an icy road makes the ice melts
B. a parent deciding what kind of punishment to give to a disobedient child
C.a judge deciding what penalty to give a convicted criminal
D. a historian writing a book about a series of different disasters that all hit the same city