Question 1

&#8203;What is formed when two or more different elements combine by sharing electrons?&#10;A) &#8203;proton&#10;B) &#8203;chemical&#10;C) &#8203;ion&#10;D) &#8203;compound

Accepted Answer

D

Question 2

&#8203;What kind of bond is formed when one atom gains an electron and another atom loses an electron?&#10;A) &#8203;ionic&#10;B) &#8203;covalent&#10;C) &#8203;hydrogen&#10;D) &#8203;molecular

Accepted Answer

A

Question 3

&#8203;What is formed when an atom loses or gains an electron?&#10;A) &#8203;proton&#10;B) &#8203;chemical&#10;C) &#8203;ion&#10;D) &#8203;compound

Accepted Answer

C

Question 4

&#8203;The compact central nucleus of an atom contains ____ and ____.&#10;A) &#8203;electrons; protons&#10;B) &#8203;electrons; neutrons&#10;C) &#8203;protons; neutrons&#10;D) &#8203;electrons; isotopes

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Question 5

&#8203;Atoms that gain ____ become negatively charged.&#10;A) &#8203;protons&#10;B) &#8203;neutrons&#10;C) &#8203;electrons&#10;D) &#8203;isotopes

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Question 6

&#8203;Elements or molecules contributing electrons during a reaction are called ____.&#10;A) &#8203;covalent&#10;B) &#8203;electron donors&#10;C) &#8203;electron acceptors&#10;D) &#8203;electron carriers

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Question 7

&#8203;What is the universal solvent?&#10;A) &#8203;carbon&#10;B) &#8203;urea&#10;C) &#8203;hydrogen&#10;D) &#8203;water

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Question 8

&#8203;Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons.

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Question 9

The two purine nitrogen bases are adenine and guanine.&#8203;

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Question 10

&#8203;Molecules containing which type of bond do not dissociate in water?&#10;A) &#8203;ionic&#10;B) &#8203;covalent&#10;C) &#8203;hydrogen&#10;D) &#8203;isotopic

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Question 11

&#8203;An element is a substance whose atoms all contain the same number of neutrons.

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Question 12

Temperature has no effect on diffusion rate.&#8203;

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Question 13

&#8203;In an atom, ____ orbit the nucleus.&#10;A) &#8203;protons&#10;B) &#8203;electrons&#10;C) &#8203;neutrons&#10;D) &#8203;isotopes

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Question 14

&#8203;The smallest carbohydrates are simple ____.&#10;A) &#8203;proteins&#10;B) &#8203;lipids&#10;C) &#8203;amino acids&#10;D) &#8203;sugars

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Question 15

Atoms that gain electrons become negatively charged.&#8203;

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Question 16

&#8203;What kind of bond is formed when two atoms share electrons?&#10;A) &#8203;ionic&#10;B) &#8203;covalent&#10;C) &#8203;hydrogen&#10;D) &#8203;isotopic

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Question 17

&#8203;What element is found in all living matter?&#10;A) &#8203;nitrogen&#10;B) &#8203;carbon&#10;C) &#8203;lithium&#10;D) &#8203;oxygen

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Question 18

&#8203;Which process occurs when water is used to break down larger molecules?&#10;A) &#8203;photosynthesis&#10;B) &#8203;combination reaction&#10;C) &#8203;synthesis&#10;D) &#8203;hydrolysis

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Question 19

&#8203;The liver converts toxic ammonia to a harmless substance called ____.&#10;A) &#8203;urea&#10;B) &#8203;carbohydrate&#10;C) &#8203;sodium&#10;D) &#8203;mineral salt

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Question 20

What are the smallest particles of an element?&#8203;&#10;A) &#8203;atoms&#10;B) &#8203;molecules&#10;C) &#8203;compounds&#10;D) &#8203;cells

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Question 21

&#8203;What kind of bonds do the mineral salts form?&#10;A) &#8203;hydrogen&#10;B) &#8203;ionic&#10;C) &#8203;covalent&#10;D) &#8203;isotopic

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Question 22

&#8203;Starch, glycogen, and cellulose are all examples of ____.&#10;A) &#8203;carbohydrates&#10;B) &#8203;lipids&#10;C) &#8203;proteins&#10;D) &#8203;nucleotides

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Question 23

&#8203;The covalent bonds that are formed between different amino acids to form a protein are known as ____.&#10;A) &#8203;peptide bonds&#10;B) &#8203;ionic bonds&#10;C) &#8203;hydrogen bonds&#10;D) &#8203;electrolyte bonds

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Question 24

With regard to pH levels, ____________________ maintain homeostasis within cells.&#8203;

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Question 25

The most abundant substance in living cells is ____________________.&#8203;

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Question 26

&#8203;When the solute concentration outside a red blood cell equals the solute concentration inside the cell, the solution is called ____.&#10;A) hypotonic&#10;B) &#8203;osmotic&#10;C) &#8203;hypertonic&#10;D) &#8203;isotonic

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Question 27

&#8203;A solution with a pH of 3 is called a(n) ____.&#10;A) &#8203;acid&#10;B) &#8203;base&#10;C) &#8203;ion&#10;D) &#8203;solute

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Question 28

&#8203;A red blood cell that is placed in a hypotonic solution will ____.&#10;A) &#8203;shrink&#10;B) &#8203;not change&#10;C) &#8203;swell&#10;D) &#8203;crenulate

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Question 29

&#8203;Protein catalysts in the body that increase the rate of chemical reactions are called ____.&#10;A) &#8203;amino acids&#10;B) &#8203;enzymes&#10;C) &#8203;atoms&#10;D) &#8203;nucleotides

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Question 30

&#8203;Tomato juice has a pH of 4; therefore, it is considered a(n) ____________________.

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Question 31

&#8203;Fats, phospholipids, and steroids are all examples of ____________________.

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Question 32

The science that deals with the elements, their compounds, and the chemical reactions that occur between elements and compounds is known as ____________________.

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Question 33

&#8203;The ____ structure of proteins is determined by the hydrogen bonds between amino acids that cause the protein to coil into helices or pleated sheets.&#10;A) &#8203;secondary&#10;B) &#8203;tertiary&#10;C) &#8203;primary&#10;D) &#8203;quaternary

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Question 34

&#8203;Which type of chemical bond holds water molecules together by forming a bridge between the negative oxygen atom of one water molecule and the positive hydrogen atoms of another water molecule?&#10;A) &#8203;isotopic&#10;B) &#8203;hydrogen&#10;C) &#8203;ionic&#10;D) &#8203;covalent

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Question 35

&#8203;Distilled water has a pH of 7 and is therefore ____.&#10;A) &#8203;acidic&#10;B) &#8203;basic&#10;C) &#8203;neutral&#10;D) &#8203;ionic

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Question 36

&#8203;A(n) ____ molecule is a double-stranded helical chain made up of nucleotides.&#10;A) &#8203;ATP&#10;B) &#8203;RNA&#10;C) &#8203;DNA&#10;D) &#8203;lipid

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Question 37

&#8203;he type of transport that requires energy input is called ____.&#10;A) &#8203;passive transport&#10;B) &#8203;diffusion&#10;C) &#8203;osmosis&#10;D) &#8203;active transport

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Question 38

&#8203;Which nucleotide is found in RNA but not in DNA?&#10;A) &#8203;guanine&#10;B) &#8203;adenine&#10;C) &#8203;thymine&#10;D) &#8203;uracil

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Question 39

&#8203;DNA and RNA are examples of ____.&#10;A) &#8203;proteins&#10;B) &#8203;lipids&#10;C) &#8203;nucleic acids&#10;D) &#8203;carbohydrates

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Question 40

&#8203;The basic building blocks of proteins are ____.&#10;A) &#8203;triglycerides&#10;B) &#8203;monosaccharides&#10;C) &#8203;amino acids&#10;D) &#8203;nucleotides

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Question 41

Matching&#10;Match the description with the corresponding term.&#8203;&#10;a.&#8203;acid&#10;b.&#8203;base&#10;c.&#8203;ATP&#10;d.&#8203;diffusion&#10;e.&#8203;osmosis&#10;f.&#8203;active transport&#10;g.&#8203;DNA&#10;h.&#8203;electron&#10;i.&#8203;proton&#10;j.ammonia&#10;&#8203;movement of solute to area of lower concentration

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