Test
Module 5: Summary Quiz
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (21)
1[blank_start]Atoms[blank_end] are the basic building blocks of matter. They are composed of [blank_start]protons[blank_end] and [blank_start]neutrons[blank_end] that form the [blank_start]nucleus[blank_end] at the center of the atom as well as [blank_start]electrons[blank_end] that orbit the nucleus. Atoms have an [blank_start]equal number[blank_end] of protons and electrons, and the majority of an atom’s properties are determined by the [blank_start]number of electrons[blank_end] it has.
- AAtoms
- Bprotons
- Cneutrons
- Dnucleus
- Eelectrons
- Fequal number
- Gnumber of electrons
2An [blank_start]element[blank_end] is a collection of atoms that all have the same number of protons.
- Aelement
- Batom
- Cosmosis
- Delectron
3A carbon atom has six protons and eight neutrons. The complete name of this atom is [blank_start]carbon-14[blank_end] and it has [blank_start]six[blank_end] electrons.
- Acarbon-14
- Bhydrogen-14
- Cphosphorous
- Dsulfur
- Esix
- Ffour
- Geight
- Hthree
4The more important biological elements and their abbreviations (in parentheses) are: [blank_start]carbon[blank_end] (C), [blank_start]hydrogen[blank_end] (H), [blank_start]oxygen[blank_end] (O), [blank_start]nitrogen[blank_end] (N), [blank_start]phosphorus[blank_end] (P), and [blank_start]sulfur[blank_end] (S)
- Acarbon
- Bhydrogen
- Coxygen
- Dnitrogen
- Ephosphorus
- Fsulfur
5“Sulfur-32” is the name of a specific [blank_start]atom[blank_end], while “sulfur” is the name of an [blank_start]element[blank_end].
- Aatom
- Belement
6When atoms link together, they form [blank_start]molecules[blank_end]. A molecule of ethyl alcohol, C2H6O, has [blank_start]two[blank_end] carbon atoms, [blank_start]six[blank_end] hydrogen atoms, and [blank_start]one[blank_end] oxygen atom.
- Amolecules
- Btwo
- Csix
- Done
7Even though they both contain [blank_start]carbon[blank_end] and [blank_start]oxygen[blank_end] atoms, CO and CO2 are [blank_start]different[blank_end] molecules.
- Acarbon
- Boxygen
- Cdifferent
8When sucrose is dissolved in water, a [blank_start]physical[blank_end] change has taken place. On the other hand, when sucrose reacts with water with the help of an enzyme to make glucose and fructose, a [blank_start]chemical[blank_end] change has occurred. In general, [blank_start]physical changes[blank_end] are reversible, while [blank_start]chemical changes[blank_end] are not.
- Aphysical
- Bchemical
- Cphysical changes
- Dchemical changes
9All matter can exist in one of three phases: [blank_start]solid[blank_end], [blank_start]liquid[blank_end], and [blank_start]gas[blank_end]. Adding energy turns [blank_start]solids[blank_end] into [blank_start]liquids[blank_end] and liquids into [blank_start]gases[blank_end], while taking away energy tends to reverse the process.
- Asolid
- Bliquid
- Cgas
- Dsolids
- Eliquids
- Fgases
10When [blank_start]salt[blank_end] is dissolved in [blank_start]water[blank_end], salt is the solute, water is the solvent, and the solution is [blank_start]salt water[blank_end].
- Asalt
- Bwater
- Csalt water
11When a solute travels across a membrane in order to even out concentration, [blank_start]diffusion[blank_end] has occurred. When the solvent travels across a membrane in order to even out concentration, [blank_start]osmosis[blank_end] has occurred. Osmosis happens when a semipermeable membrane separates [blank_start]two solutions[blank_end].
- Adiffusion
- Bosmosis
- Ctwo solutions
12A cell sits in a solution that has a higher concentration of solutes than that found in the cell. Water will tend to travel [blank_start]out of the cell[blank_end] and [blank_start]into the solution[blank_end].
- Aout of the cell
- Binto the solution
- Cout of the solution
- Dinto the cell
13In the balanced chemical equation:
C18 H32 O16 + 2H2O → 3C6H12O6
[blank_start]One[blank_end] molecule of C18H32O16 reacts with [blank_start]two[blank_end] molecules of H2O to make [blank_start]three[blank_end] molecules of C6H12O6.- AOne
- Btwo
- Cthree
14Photosynthesis requires [blank_start]carbon dioxide[blank_end], [blank_start]water[blank_end], [blank_start]energy from light[blank_end], and [blank_start]chlorophyll[blank_end] (which acts as a catalyst). It produces [blank_start]glucose[blank_end] and [blank_start]oxygen[blank_end] via the chemical equation:
[blank_start]6CO2[blank_end] + [blank_start]6H2O[blank_end] → [blank_start]C6H12O6[blank_end] + [blank_start]6O2[blank_end]- Acarbon dioxide
- Bwater
- Cenergy from light
- Dchlorophyll
- Eglucose
- Foxygen
- G6CO2
- H6H2O
- IC6H12O6
- J6O2
15Glucose and fructose both have the same chemical formula, [blank_start]C6H12O6[blank_end], which means they are [blank_start]isomers[blank_end]. They have different [blank_start]structural[blank_end] formulas. A molecule can have more than one [blank_start]structural formula[blank_end]. Glucose and fructose, for example, have both a [blank_start]ring[blank_end] structure and a [blank_start]chain[blank_end] structure.
- AC6H12O6
- Bisomers
- Cstructural
- Dstructural formula
- Ering
- Fchain
16 A simple sugar is called a [blank_start]monosaccharide[blank_end]. Two such simple sugars can join to make a
[blank_start]disaccharide[blank_end]. If three or more join, they form a [blank_start]polysaccharide[blank_end]. Simple sugars join together through
[blank_start]dehydration[blank_end] reactions.- Amonosaccharide
- Bdisaccharide
- Cpolysaccharide
- Ddehydration
17People and animals store excess sugars as a [blank_start]polysaccharide[blank_end] known as [blank_start]glycogen[blank_end]. When they need the simple sugars again, they break down this molecule into [blank_start]monosaccharides[blank_end] via [blank_start]hydrolysis[blank_end] reactions.
- Apolysaccharide
- Bglycogen
- Cmonosaccharides
- Dhydrolysis
18The pH scale runs from [blank_start]zero[blank_end] to [blank_start]fourteen[blank_end]. A pH of [blank_start]seven[blank_end] is neutral. A pH [blank_start]lower than seven[blank_end] indicates an [blank_start]acidic[blank_end] solution, while a pH [blank_start]greater than seven[blank_end] indicates an [blank_start]alkaline[blank_end] solution.
- Aseven
- Blower than seven
- Cgreater than seven
- Dacidic
- Ealkaline
- Fzero
- Gfourteen
19Lipids are formed in [blank_start]dehydration[blank_end] reactions where three [blank_start]fatty acid molecules[blank_end] are joined to one [blank_start]glycerol[blank_end] molecule. Lipids are [blank_start]hydrophobic[blank_end], meaning they are not attracted to water. If the [blank_start]fatty acid[blank_end] molecules that make up the lipid have no double bonds between the carbon atoms, it is a [blank_start]saturated fat[blank_end] and is generally [blank_start]solid[blank_end] at room temperature. If there are double bonds between the carbon atoms, it is an [blank_start]unsaturated fat[blank_end] and is generally [blank_start]liquid[blank_end] at room temperature.
- Adehydration
- Bfatty acid molecules
- Cglycerol
- Dhydrophobic
- Efatty acid
- Fsaturated fat
- Gsolid
- Hunsaturated fat
- Iliquid
20Proteins are formed in [blank_start]dehydration[blank_end] reactions where [blank_start]amino acids[blank_end] are joined together. The bond that forms between them is called a [blank_start]peptide bond[blank_end]. [blank_start]Enzymes[blank_end] make up a special class of proteins that serve as [blank_start]catalysts[blank_end] for many biologically-important chemical reactions, and they typically work according to the [blank_start]lock and key theory of enzyme action[blank_end], in which an active site complements the shape of a reactant. Many of these molecules are quite [blank_start]fragile[blank_end], breaking down soon after they are formed.
- Adehydration
- Bamino acids
- Cpeptide bond
- DEnzymes
- Ecatalysts
- Flock and key theory of enzyme action
- Gfragile
21[blank_start]DNA[blank_end] is a double chain of chemical units known as [blank_start]nucleotides[blank_end] that twist around one another in a double helix. The units that make up these chains are composed of three basic constituents: [blank_start]deoxyribose[blank_end], a [blank_start]phosphate group[blank_end], and a [blank_start]nucleotide base[blank_end]. The double helix is held together by [blank_start]hydrogen bonds[blank_end] that link certain [blank_start]nucleotide bases[blank_end] together. In DNA, [blank_start]guanine[blank_end] can link only to [blank_start]cytosine[blank_end] (and vice-versa), while the nucleotide base [blank_start]adenine[blank_end] can link only to [blank_start]thymine[blank_end] (and vice-versa).
- ADNA
- Bnucleotides
- Cdeoxyribose
- Dphosphate group
- Enucleotide base
- Fhydrogen bonds
- Gnucleotide bases
- Hguanine
- Icytosine
- Jadenine
- Kthymine
Información
- Descripción
- Use the lesson to complete the quiz until you don't need the lesson anymore. You can check your answers as you go and the correct answers will be provided at the end of the quiz.
- Autor
- Anita Thomer
- Idioma
- English
- Visitas
- 92
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test