Ch.8 - Energy and MetabolismWorksheetSee all chapters
All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology
Sections
Thermochemistry
ATP
Enzymes
Metabolism

Solution: Which of the following is/are true of enzymes?A. They are involved in almost all facets of a cell's metabolism.B. They function by lowering activation energy of reactions.C. are composed primarily of polypeptides, which are polymers of amino acids.D. A and B are trueE. All of the above are true.

Problem

Which of the following is/are true of enzymes?

A. They are involved in almost all facets of a cell's metabolism.

B. They function by lowering activation energy of reactions.

C. are composed primarily of polypeptides, which are polymers of amino acids.

D. A and B are true

E. All of the above are true.

Solution

An enzyme is commonly known as a biological catalyst. These are compounds usually found in living systems that speeds up specific reactions without being consumed in the process. Some enzymes are RNA molecules, known as ribozymes but most of these enzymes are proteins, or polymers of amino acids (polypeptides).

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