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