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ISTEP Review
ISTEP Review
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Biology
Flashcards
65 cards
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Practice quiz
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Host live
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Questions
65
Answers
1
Which means of particle transport is shown?
exocytosis
facilitated diffusion
protein pump
endocytosis
2
Photosynthesis uses sunlight to convert water and carbon dioxide into
oxygen and high-energy sugar
ATP and Oxygen
oxygen and carbon
high-energy sugar and proteins
3
What is adding bases to the strand?
histones
nucleosomes
chromatin
DNA polymerase
4
What is the function of the nucleus?
builds proteins
stores sugars
packages proteins
stores DNA
5
Plants make their own food and are called
heterotrophs
pigments
thykloids
autotrophs
6
If a pea plants alleles for height are tt, what is true about the parents?
both parents were short
both parents contributed a dominant allele
both parents contributed a recessive allele
both parents were tall
7
Based on the tables info, what percentage of guanine bases are in chicken DNA?
28.8%
19.9%
13.4%
21.5%
8
a symbiotic relationship in which on organism is harmed while the other benefits is
commensalism
parasitism
mutualism
predation
9
If an organisms diploid number is 12, its haploid number is
12
24
3
6
10
the three particles that make up atoms are
protons, neutrons, and isotopes
protons, neutrons, and electrons
positives, negatives, and neutrons
neutrons, isotopes, electrons
11
The work of scientists usually begins with
drawing conclusions
testing hypothesis
creating experiments
careful observation
12
The average conditions of the atmosphere in a particular area are referred to as the area's
climate
latitude
weather
ecosystem
13
The different forms of a gene are called
hybrids
traits
alleles
pollinations
14
The movement of organisms into a range is called
emigration
population shift
immigration
carrying capacity
15
What goes in box 5 of this food web?
carnivores
decomposers
herbivores
scavengers
16
This image illustrates which characteristics of living things
living things need material and energy
all things reproduce
living things grow and develop
living things are made of cells
17
Which of the following is a food chain in the food web shown?
tree, deer, mountain lion, fox
grass, grasshopper, snake, hawk
grass, caterpillar, robin, hawk
tree, rabbit, hawk
18
During a controlled experiment, a scientist isolates and tests
a single variable
a mass of information
a conclusion
a control group
19
Gametes are produced by the process of
mitosis
crossing over
replication
meiosis
20
Which organelle breaks down organelles that are no longer useful?
mitochondria
endoplasmic reticulum
lysosome
golgi apparatus
21
you suggest that the presence of water could accelerate the growth of bread mold. This is
an experiment
an analysis
a conclusion
a hypothesis
22
information gathered from observing a plant grow 3 cm over 2 weeks is called
hypothesis
variables
data
inferences
23
plants are
omnivores
primary producers
herbivores
primary consumers
24
What is formed at the end of meiosis?
two genetically different cells
two genetically identical cells
four genetically different cells
four genetically identical cells
25
What if the population of the bird species in the ecosystem were to suddenly decrease?
the grass and fish would compete for resources
the fish population would increase
the fish would occupy the bird niche
the grass population would increase
26
Which means of particle transport is shown?
active transport
diffusion
osmosis
facilitated transport
27
Each of the following is a condition necessary for natural selection EXCEPT
there is heritable variation among members of the population
population size is very large
fitness varies among individuals
more offspring are born than can survive
28
Looking at a cell under the microscope, you note it is a prokaryote. How do you know?
it lacks a membrane
it lacks a nucleus
it lacks genetic material
it lacks cytoplasm
29
The basic unit of length in the metric system is the
yard
gram
meter
liter
30
only 10% of energy is passed to the next trophic level. Some is used in life processes and
stored as fat
stored as body tissue
eliminated as heat
reproduction
31
The graph shows bacterial growth. Which describes the growth curve?
demographic
limiting
logistic
exponential
32
a predator is an animal that
lives inside another animal
eats plants
lives on another animal without harming it
kills and eats other animals
33
During Diffusion, the concentration of molecules is equal on both sides, the molecules will?
move to the inside of the cell
stop moving
continue to move across the membrane
move to the outside of the cell
34
invasive species can threaten biodiversity by
crowd out native species
deforstation
reducing fertile land
biological magnification
35
Which best describes the organization of an ecosystem?
species make up populations, make up communities
species make up communities, make up populations
populations make up species, make up communities
communities make up species, make up populations
36
The diffusion of water across a membrane is called
osmosis
pinocytosis
active transport
osmotic pressure
37
The lowest level of environmental complexity that includes living and nonliving factors is a
ecosystem
community
community
biome
38
What happens during translation?
Transfer RNA is made from a messenger RNA code
The cell uses a messenger RNA code to make proteins
messenger RNA is made from a DNA code
Copies of DNA molecules are made
39
According to Darwins theory of natural selection, individuals who survive are best adapted due
possession of inherited adaptations that maximize fitness
lack of competition within the species
the possession od adaptations developed through use
choices made by plant and animal breeders
40
What is the primary function of the cell wall?
help the cell move
direct the activities of the cell
store DNA
support and protect the cell
41
What is the smallest living objects that biologists study?
molecules
cells
organisms
body organs
42
What is produced during transcription?
DNA molecules
proteins
RNA molecules
RNA polymerase
43
a symbiotic relationship in which both species benefit is
predation
mutualism
parasitism
commensalism
44
if the pH of stomach acid and of oven cleaner were measured
both would be below 7
stomach acid below 7, oven cleaner above 7
stomach acid would be above 7, oven cleaner below 7
both be above 7
45
Sea otters live in the ocean. Which is not likely a limiting factor?
competition
drought
predation
disease
46
A branch of biology that deals with interactions among organisms and their environment
economy
recycling
modeling
ecology
47
Which of the following happens when a cell divides?
The cells volume increases
Each daughter receives its own copy of the parent cells DNA
It becomes more difficult for the cell to get rid of waters
It becomes more difficult to get oxygen and nutrients
48
The pattern of spacing between individuals across the range of a population is its
growth rate
density
habitat
distribution
49
Organisms that have two identical alleles for a particular trait are said to be
homozygous
heterozygous
dominant
hybrid
50
What is shown in the figure
Crossing Over
Replication
Independent Assortment
Anaphase 1 of Meiosis
51
This example represents which big idea in biology?
evolution
homeostasis
growth, development, and reproduction
interdependence in nature
52
How many meters are in 2.4 km?
240
240,000
24,000
2,400
53
What is this structure
a DNA molecule
a RNA molecule
an amino acid
a protein
54
Which structure makes proteins using coded instructions copied onto mRNA?
Ribosomes
Vacuole
Golgi Apparatus
Mitochondria
55
In what ways are herbivores and carnivores alike?
both are autotrophs
both consume other organisms
both use photosynthesis
both consume producers
56
Gametes have
twice the number of chromosomes
two sets of chromosomes
homologous chromosomes
one allele for each gene
57
What organelle converts chemical energy stored in food into compounds the cell can use?
Mitochondria
Centriole
Rough ER
Chloroplast
58
Which is NOT a principle of the cell theory?
all cells are produced from existing cells
all living things are made of cells
very few cells are able to reproduce
cells are the basic units of life
59
Which of the following is NOT a basic method used y ecologists to study the living world?
modeling
animal training
experiments
observing
60
What is the correct equation for cellular respiration?
Oxygen + Glucose -> Carbon Dioxide + Water + Energy
Oxygen + Glucose + Energy -> Carbon Dioxide + Water
Carbon Dioxide + Water -> Oxygen + Glucose + Energy
Carbon Dioxide + Water + Energy-> Oxygen + Glucose
61
Cross a Tt with a tt. The probability that offspring will be tall is
50%
75%
100%
25%
62
The algae at the beginning of the food chain are
decomposers
autotrophs
primary consumers
heterotrophs
63
When during the cell cycle are chromosomes visible?
only during G1 Phase
only when they are being replaced
only during cell division
only during interphase
64
Which amino acid is specified by the mRNA code CCC?
Pro
Lys
Gly
Ala
65
A cell membrane has channels/pumps move materials in/out of the cell. What are they made of?
lipids
bilipids
carbohydrates
proteins
