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WorksheetsBiology Unit 1 Test (updated 2020)
Total questions: 33
Worksheet time: 18mins
Which is the correct order of biological systems?
cell, organ system, organism, ecosystem, biosphere, universe
cell, organism, organ system, ecosystem, biosphere, universe
organism, cell, ecosystem, biosphere, organ system, universe
organ system, cell, organism, ecosystem, universe, biosphere
Which of the following are characteristics of living things?
Metabolizing (breaking and making things)
Pass on genetic material
Contains at least one cell
Responds to environment
When things evolve, it means there is a
metabolic process
a single organism changes to fit an environment
change in populations over time
change in the biodiversity in one ecosystem
What is metabolism?
the energy used to make a product
responding to external stimuli
all the energy uses for chemical processes
speeding up a chemical reaction
A solution with a pH of 8 is ______________, while one with a pH of 3 is ________________.
acidic, basic
basic, acidic
basic, iostonic
isotonic, acidic
acidic solutions have ________ H (hydrogen) ions
many
few
Biodiversity is the greatest at the ________ and lowest near the ______.
poles; equator
equator; poles
equator; inland
poles; inland
What is the lock-and-key model?
active sites of enzymes are able to bind with multiple substrates
substrates are broken into smaller pieces that fit other molecules
only certain substrates fit into an enzymes' active site
Which of the following describe enzyme function? Choose all that apply.
Enzymes catalyze (speed up) reactions
Enzymes can break and cause new bonds to form between two reactants
Active sites remake enzymes
Enzymes are found in living things
chemical reactions do which of the following? Choose any that apply.
change substances into new ones
form hydrogen ions
activates enzymes
make and break bonds
Something that is inherited and gives an organism an advantage at survival is a(n):
genome
adaptation
ecosystem
homeostasis
How do organisms maintain homeostasis? Choose all that apply.
Behaviors
Adaptations
Negative Feedback Loops
Positive Feedback Loops
Water is able to __________________; this gives it many important properties for life.
boil quickly
hydrogen bond
ionically bond
What is high specific heat?
The ability of water to stick together and cause ice to float
The ability of water to absorb heat and regulate body temperature
The process of keeping body chemistry in balance
The ability of water to expand as it freezes
How many levels of structure do proteins have?
1
2
3
4
Catalysts ______ chemical reaction rates (speed)
decrease
increase
Which of the following is a catalyzed reaction?
(a) variables are variables that stay the same for all treatments in an experiment
The variable that the experimenter changes/manipulates is the
independent variable
dependent variable
constant variable
control group
The variable that you measure, and that would be graphed on the 'y-axis' is the:
independent variable
dependent variable
constant variable
controlled variable
the smallest basic unit of LIFE is the
(a)
Energy is released from exothermic reactions as
heat
light
sound
air
the products in endothermic reactions have ______ energy than the reactants
more
less
the same
Unsaturated fatty acids have at least one double bond, while saturated fatty acids only have single bonds.
Because of this:
unsaturated fatty acids pack tightly, while saturated fatty acids sit farther apart.
saturated fatty acids pack tightly, while unsaturated fatty acids sit farther apart.
there is no difference in their functions
The biomolecule that contains CHONP and stores genetic material is:
carbohydrates
nucleic acids
proteins
lipids
The main source of energy for the body is ____________, but long term energy comes from ______________.
lipids; proteins
proteins; carbohydrates
carbohydrates; lipids
lipids; proteins
TRUE OR FALSE: Atoms need 8 valence electrons to be stable.
TRUE
FALSE
The ___________ dissolves the ______________ in a solution.
pH; solute
solute; solvent
solvent; solute
solvent; pH
An ion ..... [choose all that apply]
has a charge
is an atom that has lost/gained an electron
is an atom that has lost/gained a proton
donates or takes an electron to form a bond
water sticks to other water using _________.
adhesion
covalent bonds
ionic bonds
cohesion
Which of the following is a lipid?
Which of the following is a nucleic acid?
Which of the following is a carbohydrate?
