4. Simple enzymes have inorganic cofactors, and conjugated enzymes have organic cofactors. 5. Vitamins are required in minute quantities for normal cellular function. 6. vitamins are found in all food groups.

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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answer item no. 4-6

I. Indicate whether each of the following statements are true or false.
1. According to the lock-and-key model of enzyme action, the active site of an enzyme is flexible in
shape.
2. In an enzyme-catalyzed reaction, the compound that undergoes a chemical change is called the
substrate.
3. The nonprotein portion of a conjugated enzyme is the enzyme's active site.
4. Simple enzymes have inorganic cofactors, and conjugated enzymes have organic cofactors.
5. Vitamins are required in minute quantities for normal cellular function.
6. vitamins are found in all food groups.
7. Ribose sugars are found on one chain of the DNA molecule and deoxyribose sugars are found on
the other chain of the DNA molecule.
8. A DNA molecule has a double helix at one end of the molecule and a single helix at the other end of
the molecule.
9. Complementary bases are held together by covalent bonds.
_10. DNA molecules always contain the nitrogenous base thymine.
Transcribed Image Text:I. Indicate whether each of the following statements are true or false. 1. According to the lock-and-key model of enzyme action, the active site of an enzyme is flexible in shape. 2. In an enzyme-catalyzed reaction, the compound that undergoes a chemical change is called the substrate. 3. The nonprotein portion of a conjugated enzyme is the enzyme's active site. 4. Simple enzymes have inorganic cofactors, and conjugated enzymes have organic cofactors. 5. Vitamins are required in minute quantities for normal cellular function. 6. vitamins are found in all food groups. 7. Ribose sugars are found on one chain of the DNA molecule and deoxyribose sugars are found on the other chain of the DNA molecule. 8. A DNA molecule has a double helix at one end of the molecule and a single helix at the other end of the molecule. 9. Complementary bases are held together by covalent bonds. _10. DNA molecules always contain the nitrogenous base thymine.
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