biology Flashcards
(24 cards)
The assembly of proteins in a cell
takes place in the
A nucleus
B vacuoles
C ribosomes
D mitochondria
The assembly of proteins in a cell takes place in the ribosomes.
Which of the following is an organism whose cells) lack(s)
membrane-bound organelles?
A nucleolus
B chromatin
C eukaryote
D prokaryote
Prokaryote
Example: Bacteria are prokaryotic organisms.
In all reptiles, birds, and mammals, the processes of excretion, water and salt balance, and the regulation of pH in body fluids are controlled by the kidneys. This is an example of the
organism maintaining
A reabsorption
B homeostasis
C insulation
D hibernation
Homeostasis
Proteins are long chains or
polymers made up of
A nucleotides
B carbohydrates
C ammo acids
D lipids
Amino acids
Which of the following molecules provides the greatest amount of energy per gram of mass when
metabolized?
A carbohydrate
B nucleic acid
C protein
D lipid
lipids
Which of the following environmental changes can cause an increase in the rates of chemical
reactions in cells?
A increased temperature
B decreased enzyme concentrations
C increased activation energy
requirement
D decreased diffusion rates
increased temperature
The function of chlorophyll in a
light reaction is to
A bind COz to H20
B split to produce Oz
C trap light energy
D act as a source of COz
trap light energy
A group of prokaryotes that live in
extreme environments are the
A Viruses
B protists
C eubacteria
D archaebactera
archaebacteria
The complexity of body systems
differs greatly among organisms. Which of the following organisms has developed organ systems for
obtaining and utilizing energy?
A bacterium
B mushroom
C mouse
D virus
C - mouse
Which statement is true about
viruses?
A They can reproduce.
B They are autotrophs.
C They contain organelles.
D They are living organisms.
A
Scientists have discovered a new species of animal. Which would provide the best basis for
classifying this new species?
A DNA comparison
B diet of animal
C habitat of animal
D appearance of animal
A
Which of the following is the
correct base-pairing rule for
DNA?
A A-U; C-G
B A-G; T-C
C A-T; G-C
D A-C; I-G
C
A type of mutation that can alter DNA by the loss of a nucleotide
base is known as
A substitution
B crossing over
C deletion
D insertion
C
In Mendel’s experiments with a single trait, the trait that disappeared in the first generation and reappeared in the next
generation is called the
A homozygous trait
B dommant trait
C recessive trait
D heterozygous trait
C
DNA in an individual’s gametes will most likely be altered before being passed to offspring if
exposed to
A X-rays
B loud sounds
C magnetic fields
D extreme temperatures
A
In fruit flies, the gray body color (G) is dominant to the ebony body color (g). What is the genotypic
ratio of the offspring of a heterozygous gray female and an
ebony male?
A 25% Gg, 75% gg
B 50% Gg, 50% gg
C 75% gray, 25% ebony
D 100% gray
B
A characteristic of RNA is that it
A remains in the chromosomes in
the nucleus B is involved in translating
information in DNA into proteins
C undergoes crossing-over during
meiosis
D is replicated during the process
of mitosis
B
Which of the following shows how information is transformed to
make a protein?
A DNA? RNA? protein
B gene? chromosome? protein
C cell respiration? ATP?
protein
D ATP? amino acid? protein
A
A group of organisms of a certain species that is in one area at a
given time is known as
A an ecosystem
B a community
C a population
D a trophic level
C
As energy flows through an
ecosystem, at each trophic level it
A increases
B decreases
C fluctuates
D remans the same
B
Predators often feed on weak or sick animals in an ecosystem. The role of the predator is described as
its
A community
B habitat
C niche
D population
C
Lightning causes a fire that destroys all the plants in a forest
community. Which of the following will MOST likely be the
first to occupy the burned area?
A oak seedlings
B pine trees
C grasses and annual plants
Dwoody shrubs
C
The state of California has several large cities and very productive croplands that divert and use large
amounts of water from rivers. What is one damaging effect of this
use of the rivers’ water?
A increased amounts of solid waste
pollution in oceans
B decreased amounts of fresh water
in marshes and estuaries
C changes in local rainfall amounts
D changes in upstream water tables
B
Plants that live in the rain forest have many adaptations to their environment. Some plants, such as vines, have adaptations that allow them to attach themselves to the trunks of trees. These adaptations allow vines to successfully compete for which of the following limited
resources in the rain forest?
A sunlight
B water
C carbon dioxide
D oxygen
A
