EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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Textbook Question
Chapter 3, Problem 8SQ
Enzymes _______.
- a. enhance reaction rates
- b. are affected by pH
- c. act on specific substrates
- d. all of the above
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Students have asked these similar questions
When an enzyme catalyzes a reaction… A. The pH changes B. Substrate concentration is reduced C. Product concentration is reduced D. Substrate concentration is increased
An Enzyme..
A. Becomes part of the final products
B. Is consumed by the reaction
C. Is nonspecfic for substrate
D. is heat & pH sensitive
The following statement can be said about enzymes:
A. lowers activation energy of reactions
B. regulates chemical activities in the body
C. 3D shape is essential for normal function
D. all of these
E. B and C only
Chapter 3 Solutions
EBK HUMAN BIOLOGY
Ch. 3 - Describe the general functions of the following in...Ch. 3 - Which organelles are in the endomembrane system?Ch. 3 - Distinguish between the following pairs of terms:...Ch. 3 - What do enzymes do in metabolic reactions?Ch. 3 - In aerobic cellular respiration, which reactions...Ch. 3 - For the diagram of the aerobic pathway shown in...Ch. 3 - The plasma membrane __________. a. surrounds the...Ch. 3 - The _________ is responsible for a eukaryotic...Ch. 3 - Cell membranes consist mainly of a _________. a....Ch. 3 - Prob. 4SQ
Ch. 3 - The passive movement of a solute through a...Ch. 3 - Match each organelle with its correct function.Ch. 3 - Which of the following statements is not true?...Ch. 3 - Enzymes _______. a. enhance reaction rates b. are...Ch. 3 - Match each substance with its correct descriptionCh. 3 - Cellular respiration is completed in the ______....Ch. 3 - Prob. 11SQCh. 3 - In a mitochondrion, where are the electron...Ch. 3 - Prob. 1CTCh. 3 - Jogging is considered aerobic exercise because the...Ch. 3 - Section 3.17 mentions that arsenic poisons human...Ch. 3 - The cells of your body never use nucleic acids as...
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- _______are always changed by participating in a reaction. a. Enzymes c. Reactants b. Cofactors d. Coenzymesarrow_forwardthe loss of electrons by one atom or molecule to another a. oxidation b. reduction c. catalysis d. synthesis e. degradationarrow_forwardINSTRUCTIONS - Answer the following multiple-choice questions and EXPLAIN in 3-5 sentences why you chose that answer. Answer properly -arrow_forward
- Which of the following is NOT true of enzymes? A. Made of protein B. Made of carbohydrates C. React with a substrate D. Are not altered with reactions.arrow_forwardEnzymes catalyze a chemical reaction by A. decreasing the amount of ATP required to activate a reaction B. increasing the amount of ATP required to activate a reaction C. slowing down the reaction to obtain more products D. increasing the reaction to obtain more products E. decreasing the amount of ATP required and obtaining more products.arrow_forwardItem 35 Organic cofactors are referred to as _________. Fill in the blank Item36 Item Item 36 Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the Multiple Choice a. allosteric site, and its effectiveness is not influenced by substrate concentration. b. allosteric site, and its effectiveness depends on substrate concentration. c. active site, and its effectiveness is not influenced by substrate concentration. d. active site, and its effectiveness depends on substrate concentration. e. substrate, and its effectiveness depends on product concentration. Item37 Item 37 A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor. Fill in the blank Item 38 Lactase is an enzyme that digests lactose. True or False Item 39 Exergonic reactions do not require activation energy. True or Falsearrow_forward
- Please choose one of these answers A. An allosteric inhibitor appeared B. There was a dramatic change jn the pH. C. The enzyme had achieved its maximum velocity. D. The enzyme had denatured E. A large amount of the substrate had been consumed.arrow_forwardAn enzyme __________ the activation energy required for a chemicalreaction.a. increases b. converts c. lowers d. catalyzesarrow_forward. Enzymes provide activation energy for the chemical reactions. * A. True B. Falsearrow_forward
- is when one substrate molecule primes an enzyme to act on additional substrate molecules more readily a. Catalysis b. Cooperativity c. Feedback inhibition d. Activation energy e. Catabolismarrow_forwardItem 35 Organic cofactors are referred to as _________. Fill in the blank 36 Item 36 Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the Multiple Choice a. allosteric site, and its effectiveness is not influenced by substrate concentration. b. allosteric site, and its effectiveness depends on substrate concentration. c. active site, and its effectiveness is not influenced by substrate concentration. d. active site, and its effectiveness depends on substrate concentration. e.substrate, and its effectiveness depends on product concentration.arrow_forwardThe ability of an enzyme’s active sites to bind only substrates of compatible shape and charge is known as ________.a. selectivityb. specificityc. subjectivityd. specialtyarrow_forward
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