multiple choice
A neutral hydrogen atom with a mass number of 1 has ___ neutrons, ___ protons, and ___ electrons 0, 1, 1, 1, 1, 1, 0, 1, 0 1, 0, 0
a
___ are monomers that form polymers called__ nucleotides, nucleic acids amino acids, nucleic acids monoglycerides, triglyercides carbohydrates, monosaccharides
a
a hydrogen bond is distinct from ionic and covalent bonds in that it is a weak attractions between two molecules forms only between between two hydrogen atoms is considerably stronger than the other two types of bonds occurs more commonly in lipids than in other types of molecules
a
an ionic bond forms when an electrical attraction occurs between two atoms of different charge a nonpolar attraction is formed between two atoms a valence electron is shared between two atoms two atoms have similar attraction for electrons
a
because plants extract nutrients from soil and use sunlight as an energy source, they are considered to be autotrophs consumers heterotrophs decomposers
a
what is the basic unit of life atom molecule organelle cell
a
what type of chemical bond forms during a dehydrations synthesis reaction covalent hydrogen ionic polymer
a
A human nerve cell that has an abnormal shape most likely has a defective cell wall cytoskeleton nucleus ribosome
b
a hydrophilic substance is one that can form covalent bonds with hydrogen dissolve in water buffer in solution mix with nonpolar solvents
b
a scientist has just observed a new phenomenon and wonders how it happens. what is the next step in his or her discovery of the answers observe hypothesize experiment peer review
b
in an experiment to test the effect of temperature on the rate of bacterial reproduction, temperature would be the standardized variable independent variable dependent variable control variable
b
what is the correct way to write the scientific name for humans Homo sapiens Homo sapiens (italicized) Homo Sapiens (italicized) homo sapiens
b
a covalent bond forms when electrons are present in a valence shell a valence electron is removed from one atoms and added to another a pair of valence electrons is shared between two atoms one atom attracts electrons more strongly than another atoms
c
can a theory be proven wrong no, theories are exactly the same as facts no, because there is no good way to test a theory yes, a new observation or interpretation of data could disprove the theory yes, theories are exactly the same as hypothesis
c
how many neutrons does a carbon 14 atom have in its nucleus 6 7 8 14
c
what type of cellular junction prevents stomach acid from leaking into the abdomen and digesting internal organs plasmodesmata anchoring junctions tight junctions gap junctions
c
which two levels are farthest apart on the hierarchy of biological organization organism and population ecosystem and biosphere atom and cell tissue and organ
c
within a single cell, which of the following is physically the smallest nuclear envelope cell membrane phospholipid molecule mitochondrion
c
a sugar is an example of a ___, whereas DNA is a ___ protein, nucleic acid lipid, protein nucleic acid, lipid carbohydrate, nucleic acid
d
all of the following are characteristics of life except evolution reproduction homeostasis multicellularity
d
evolution through natural selection will occur most rapidly for populations of plants that are already well adapted to the environment live in an unchanging environment are in the same genus reproduce sexually and live in an instable environment
d
one property that distinguishes cells in domain bacteria from those in domain eukarya is the presence of a cell wall DNA flagella membranous organelles
d
what chemical property of phospholipids is key to the formation of the cell membrane the two phosphate groups embedded in each fatty acid tail the hydrophilic glycerol the four fatty acids extending above and below each phosphate the hydrophilic head group attached to two hydrophilic fatty acids
d
what type of chemical bond is being broke when methane burns in oxygen ionic polar covalent hydrogen nonpolar covalent
d
which of the following statements is false emergent properties are functions that arise form the interactions between an organism's parts two of the three domains contain prokaryotic organisms when medical researchers test the effectiveness of a new drug, they typically compare the new drug to placebo for a scientific study to be considered valid, the researches must conduct experiments
d
