EBK BODY STRUCTURES AND FUNCTIONS
13th Edition
ISBN: 8220101465061
Author: Fong
Publisher: YUZU
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The smallest particle of an element that still has the chemical characteristics of that element is a(n)a. electron. c. neutron. e. atom.b. molecule. d. proton.
Which of the following molecules generally possesses a complex shape that allows the
molecule to function as tools and machinery that essentially do all the work within a
living cell?
20.
A. triglycerides
B. proteins
C. carbohydrate
D. A and B are correct.
Which of the following describes an organic molecule that consists of one or more chains of amino acids folded up in a specific shape?
A. Nucleic acid
B. Protein
C. Carbohydrate
D. Lipid
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- The smallest unit of any substance is the . a. atom b. molecule c. cellarrow_forwardA substance that has weight and occupies space is calleda. kinetic energy.b. a catalyst.c. matter.d. potential energy.arrow_forwardWhat is a proton? A. A negatively charged particle B. A positively charged particle C. An element on the periodic table D. Any particle found in the nucleusarrow_forward
- Describe the unique features of the following molecules, why are the critical to life? a. Carbohydrates b. Lipids. c. Proteins. d. Nucleic Acids.arrow_forwardWhich of the following is a representation of a covalently bonded molecule that shows the relative size and position of atoms in three dimensions? A. Structural model B. Structural formula C. Shell model D. Chemical formulaarrow_forwardThis occurs when the cations and anions are attracted to the positive and negative ends of water molecules: A. ionic bonding B. dissociation C. covalent bonding D. hydrogen bondingarrow_forward
- Which of the following statements about chemicalbonds is true?a. Covalent bonds are stronger than ionic bonds.b. Hydrogen bonds occur between two atoms ofhydrogen.c. Bonding readily occurs between nonpolar andpolar molecules.d. A molecule of water is unlikely to bond with anion.arrow_forwardWhich class of macromolecule generally contains the most phosphorus (P)? a. nucleic acids b. carbohydrates c. proteinsarrow_forwardWhich of the following alters proteins and membranes? a. Alcohols b. Iodine c. All other choices d. Phenolic compoundsarrow_forward
- A carbon atom contains six protons and six neutrons.A. What are its atomic number and atomic weight?B. How many electrons does it have?C. How many additional electrons must it add to fill its outermost shell? How does this affect carbon’s chemical behavior?D. Carbon with an atomic weight of 14 is radioactive. How does it differ in structure from nonradioactive carbon? How does this difference affect its chemical behavior?arrow_forwardA proteinaceous molecule that catalyzes chemical reactions without being changed itself is known as a(n) _. - A. carbohydrate B. ion C. enzyme D. lipidarrow_forwardWhich of the following makes carbohydrates unique from the other biological macromolecules? Select one: a. Long-term energy storage is provided by carbohydrates. b. Carbohydrates contain a 1:2:1 ratio of carbon to hydrogen to oxygen. c. Carbohydrates are polymers that always form a ring structure. d. The monomers in carbohydrates are held together by peptide bonds.arrow_forward
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