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Chapter 1-2
Chapter 1-2
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Content Knowledge quiz for Chapter 1 Biology in Focus
Flashcards
66 cards
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Practice quiz
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Questions
66
Answers
1
The entire set of genetic information in a cell or an organism is referred as a _______.
chromosome
genome
chromatin
gene
2
what are buffers?
causes the pH to fluctuate
makes environment very basic
regulates pH to a narrow range
makes environment very acidic
3
Temperature represents the average kinetic energy of molecules
True
False
4
Emergent Properties:
lowest level of biological structure showing all characterustics of life
interacting populations
same species, same place, same time
result from the arrangement and interaction of parts within a system
5
The dependent variable is the.....
Changed by the scientist
Results
Stays the same
Is known before the experiment
6
Hydrophobic substances are ___.
nonpolar and dissolve in water
nonpolar and don't dissolve in water
polar and dissolve in water
polar and don't dissolve in water
7
Which of the following ARE NOT properties of water?
Surface tension
Adhesion
Cohesion
Fixed Shape
8
The gecko can climb walls due to a type of bond/ interaction, whereas a spider can walk on water due to different kind.
nonpolar covalent, polar covalent
strong ionic bond, hydrogen bond
polar covalent, Van der Waals
van der Waals, hydrogen bond
9
Chemical equilibrium is
dynamic: only the forward reaction continues
dynamic: only the reverse reaction continues
static: forward and reverse reactions cease
dynamic: forward & reverse reactions continue at equal rates
10
Which of these properties of water are helpful in transporting water through a plant?
High heat capacity
Adhesion
Good solvent
Cohesion
11
Genes are the units of inheritance that transmit information from parents to offspring.
False
True
12
Hydrogen Bonds
Form between hydrogen atoms in different molecules
Hold 2 hydrogen atoms together in a molecule of hydrogen gas
Are strong bonds
Hold water molecules to one another
13
What are the four emergent properties of water that are important for life?
mod of temperature, solvent properties, high surface tension, capillarity
cohesion, moderation of temperature, expansion upon freezing, solvent prop
cohesion, expansion upon freezing, high heat of evaporation, capillarity
polarity, hydrogen bonding, high specific heat, high surface tension
14
Energy levels of Electrons
Shells
Currents
Clouds
Particles
15
What is the "scientific method"?
An organized way of questioning, seeing, and answering.
none of these
A series of steps with a set order of use
A set series of steps used by scientists only
16
What range on the pH scale is a base?
8-14
0-14
0-6
7
17
What are the three domains?
bacteria, protists, and fungi
plants, animals, and fungi
mammals, amphibians, and reptiles
bacteria, archaea, and eukarya
18
What is a solute?
substance being dissolved
a mixture of two substances
a solution
substance doing the dissolving
19
Polar Covalent Bonds...
Do not share evenly
Share evenly
20
What is an aqueous solution?
A solute of water
An aqua liquid
water is the solvent
A sediment of water
21
Acids increase what ion in solution?
hydrogen
hydronium
hydroxide
hyroxogenium
22
Two isotopes of an element have the same number of:
pokemons
photons
protons
neutrons
23
(True or False): A hypothesis is made before an observation has taken place.
True
False
24
Why does ice float in liquid water?
hydrogen bonds in water are more ordered, making it less dense
hydrogen bonds are more chaotic in ice, making it less dense
hydrogen bonds are nonexistant, allowing ice to float
hydrogen bonds in ice are more ordered, making it less dense
25
What is adhesion?
Water bonding against another surface
Water bonding with other water molecules
The energy to change a substance from one form to another
Water bonding with nonpolar molecules
26
What is an atom?
Mixture of compounds
Smallest unit of matter
The result of a chemical reaction
Corrosive substances
27
Evaporative Cooling
Sum of the protons and neutrons in the nucleus of an atom.
- As a liquid evaporates, the surface of the liquid that remains behind coo
Composed of 2 or more atoms held together by covalent bonds.
- The dissolving agent of a solution.
28
What is the correct order from smallest to largest?
cell, organelle, organ system, community, ecosystem
molecule, cell, tissue, ecosystem, community
organelle, cell, population, biosphere, ecosystem
molecule, organism, population, community, biosphere
29
What is the independent variable
When you hold something constant
The outcome
The variable being tested and changed
The variable measured
30
What is molarity?
Molarity = # moles per liter
A way to describe the concentration of solution
Molarity = liters per # moles
Molarity = grams per # moles
31
The term proteomics refers to the study of
the proteins resulting from activation of specific genes
DNA sequences with unknown functions.
identifying certain base pairs in DNA.
gene sequences in individual chromosomes.
32
Prokaryotic and Eukaryotic cells both have
Mitochondria
a Nucleus
DNA
Chloroplast
33
What is a solvent
a substance dissolved into a solution
a liquid not capable of being mixed to form a stable solution
a stable physical mixture of two or more substances
a substance that dissolves a solute and makes a solution
34
Water has special properties, such as high cohesion and others. What kind of bonds between molecules allows for this?
nonpolar covalent bonds
polar covalent bonds
hydrogen bonds
strong ionic bonds
35
Biology is the study of...
Life
The Universe
Medicine
Chemicals
36
What is a compound?
Homogeneous
More than one atom put together
More than one element put together
The total number of atoms in a formula
37
What is gene expression?
the attachment of DNA polymerase to the promoter
the expression of all genes in the organism
the process of converting information from a gene to its cellular product
the attachment of DNA polymerase to the operon
38
Systems biology
a group of related lab tools
a set of plants working together
the study of life science
study of biological systems by analyzing interations b/t its parts
39
Potential energy is the energy that matter has bc of its location or structure
False
True
40
Which structure is only found in eukaryotic cells?
chloroplast
DNA
nucleus
cell wall
41
What is matter?
Matter doesnt take up space
matter is liquid
matter is invisible
Matter has mass and takes up space
42
Who proposed the Theory of Evolution?
James Watson
Charles Darwin
Robert Hooke
43
What is a calorie?
an amount of heat needed to raise the temp of water
all of these
.001 Calorie
4.184 J/g·°C
44
Atomic mass = _____________ + _____________
Electrons + neutrons
Neutrons + electrons
Protons + neutrons
Valence Electrons + neutrons
45
Van Der Waals
Positive and negative charges are together
There is no positive charge
For a split second the neg and pos are on different sides
There is no negative charge
46
What is an element?
A single atoms that is uniform.
Something that consists of two or more atoms.
Consists of different types of compounds
Somethings hing that has a bitter taste.
47
What is cohesion?
How strongly the particles of a fluid attract each other.
Two people who plan together.
The attraction between particles of two different things.
The attraction on the surface of a liquid.
48
What is specific heat?
the amount of heat needed to melt a solid
amount of heat an object absorbs after a minute in the sun
the average temperature of a given substance
the heat required to raise the temperature by one degree
49
What range on the pH scale is an acid?
0-14
0-6
7
8-14
50
The actions of an organism are based on activities of _______.
Tissues
Cells
Organs
Organ systems
51
What is kinetic energy?
Energy of Science
Gravity
Energy that is stored
Energy of motion
52
Hydrophilic substances are ___.
nonpolar
acidic
water soluble
extremely dense
53
Define nonpolar covalent:
"equal" electron sharing; still covalent due to similar electronegativity
"unequal" electron sharing; still covalent due to similar electronegativity
"unequal"electron sharing;still covalent due to different electronegativity
54
Ionic Bonds:
Give/Take Electrons
Share Electrons
Split Electrons
55
What are valence electrons?
The smallest electrons
The electrons located in the outermost shell
Electrons that are closest to the nucleus
Electrons that do not bond
56
What is surface tension?
The amount of force on the surface of something
The amount of stickiness on the surface of a liquid
The measure of cohesive forces that hold molecules together
How strong water is
57
A group of organisms from one species living together in a given environment is referred to as _________.
a community
a population
an ecosystem
the biosphere
58
Which example least shows that form and function are related?
Plants that live in dry areas have large roots for absorbing water.
None of the choices is correct.
Fish that swim rapidly have bodies that are streamlined.
Seeds that are dispersed by wind are very light.
59
Covalent Bonds:
Split Electrons
Give/Take Electrons
Share Electrons
60
Chemical reactions change substances into diff. ones by breaking and forming chemical bonds.
True
False
61
Electronegativity is a measure of....
The charge of an atom
How much an atom pulls on electrons
The energy required to take electrons from an atom
62
What are the unifying themes of biology?
evolution
organization
energy and matter
interactions
information
63
What is the atomic number?
Number of protons
Number of neutrons
Number of electrons
64
Which subatomic particles are located inside the nucelus of an atom?
electrons & neutrons
protons & electrons
electrons & protons
protons & neutrons
65
molecular mass
A few compounds having different empirical and molecular
Atomic masses of all the atoms present in one molecule of a molecular sub
none
The molecular formula of a compound
66
Bioinformatics is
development of personalised medicine
construction of molecular clocks in evolutionary studies
production of phylogenetic tree diagrams
uses computational tools to store organize, and analyze lg. amounts of data
