Test 1 Biology
when converting a polypeptide into smaller sub units, which of the following chemical reactions would be needed?
A hydrolysis reaction
In DNA what is the correct base pair matching?
A-T, C-G
a cell biologist looks through a microscope at a cell which contains no nucleus. based solely in this information to which cell is he looking at
Bacteria or Archaea but not Eukarya
How do prokaryotic cells differ from eukaryotic cells
Eukaryotic cells have well developed nucleus and membrane bound organelles
which of the following functional groups when added to a carbon chain will transform it into an alcohol molecule?
Hydroxyl
What are the primary sites of protein production in a living Eukaryotic cell?
Ribosomes
The base sequence of one DNA strand is ACGCTA. what is the complementary base sequence on the other DNA strand?
TGCGAT
Most of the DNA in a Eukaryotic cell is in
The nucleus
Which is NOT true of eukaryotic cells?
They contain Ribosomes that are smaller than those of prokaryotic cells
the removal of a hydroxyl group and a hydrogen atom from two molecules to join them together is known as
a dehydration reaction
a possible explanation for a natural event is know as
a hypothesis
which of the following is not a component of a phospholipid
a non polar head
Prokaryotic cells lack:
a nucleus
when there is an unequal sharing of electrons between two atoms, what will be the result?
a polar molecule such as water
members of the same species found within a particular area are referred as
a population
on an island with scant vegetation , mostly shrubs, a typical tortoise has a notch in its shell that allows its neck to extend at ground- level vegetation, the shells of the tortoise have no notches. The notch is an example of
adaptation
Which of the following statements of The Cell Theory is NOT true?
all living thing are multicellular
the building blocks of proteins are called
amino acids
which ions found specifically in bones and teeth are important in muscle contractions and nerve conduction?
calcium
which six elements are the main components in living organisms
carbon, hydrogen, nitrogen, oxygen, phosphate and sulfate
a scientist is studying the polysaccharide which is used in plants for support. which of the following molecules would he or she study
cellulose
All of the following are parts of plant cells except
centrioles
without this part of an experiment, a scientist would have no way of knowing if the treatment worked or not
control group
The function of a chloroplast is to:
convert light energy into chemical energy
which answer choice is not a defining characteristic of life?
disorder
a sulfur atom has 6 electrons in the outer electron shell. what will it most likely do?
gain two electrons from another atom
which of the levels of taxonomy is the least inclusive?
genus
which interactions causes water molecules to attract other water molecules?
hydrogen bond
which bond occurs between positive- charged atom and a negative charged atom?
ionic bond
Which of the following is NOT a function of the smooth ER
making proteins to be secreted by the cell
when an element becomes a different isotope, what feature changes?
mass number
what would occur if all the decomposers were removed from the ecosystem?
nutrients from dead organisms could not be recycled into the ecosystem
which answer choice lists the steps in the scientific method in their typical order
observation, hypothesis, experiment, conclusion
certain insects, such as a water strider, can walk across the surface of a pond. which property of water allows this?
water molecules are able to stick to other water molecules
Chloroplasts are found in
plant cells and some protists
which of the following is not a characteristic of all living organisms?
sexual reproduction
because carbon has only four electrons in its outer shell, a carbon atom must:
share four electrons to complete its outer shell
which of the following molecules is not a monosaccharide
sucrose
the number of protons found in an atom is also known as
the atomic number
how is the mass number of an element determined?
the number of protons plus the numbers of neutrons
