BIOLOGY 2e EXAM 3 QUESTIONS
AND THEIR COMPLETE SOLUTIONS
Why are ion channels necessary to transport ions into
or out of a cell?
Ions are charged particles and cannot diffuse through the
hydrophobic interior of the membrane.
Endocrine signals are transmitted more slowly than
paracrine signals because ___________.
the ligands are transported through the bloodstream and
travel greater distances
An organism's traits are determined by the specific
combination of inherited _____.
genes
A diploid cell has_______ the number of
chromosomes as a haploid cell.
twice
Meiosis usually produces ________ daughter cells.
four haploid
Mendel performed hybridizations by transferring
pollen from the _______ of the male plant to the
female ova.
anther
A chemical signal (neurotransmitter) that travels
between nerve cells is called a __________ _________.
synaptic signal
Programmed cell death is called ________.
apoptosis
, What is the main prerequisite for clearance at the G2
checkpoint?
accurate and complete DNA replication
_________ ______ is all of the cells of a multicellular
organism except the gametes or reproductive cells
somatic cells
__________ in a heterozygote, is the complete and
simultaneous expression of both alleles for the same
characteristic
codominance
The fusing of Golgi vesicles at the metaphase plate of
dividing plant cells forms what structure?
cell plate
What structure is most important in forming the
tetrads?
synaptonemal complex
Which is one of the seven characteristics that Mendel
observed in pea plants?
seed texture
Identical copies of chromatin held together by cohesin
at the centromere are called _____.
sister chromatids
At which stage of meiosis are sister chromatids
separated from each other?
anaphase II
Imagine you are performing a cross involving seed
color in garden pea plants. What F1 offspring would
you expect if you cross true-breeding parents with
green seeds and yellow seeds? Yellow seed color is
dominant over green.
100% yellow seeds
AND THEIR COMPLETE SOLUTIONS
Why are ion channels necessary to transport ions into
or out of a cell?
Ions are charged particles and cannot diffuse through the
hydrophobic interior of the membrane.
Endocrine signals are transmitted more slowly than
paracrine signals because ___________.
the ligands are transported through the bloodstream and
travel greater distances
An organism's traits are determined by the specific
combination of inherited _____.
genes
A diploid cell has_______ the number of
chromosomes as a haploid cell.
twice
Meiosis usually produces ________ daughter cells.
four haploid
Mendel performed hybridizations by transferring
pollen from the _______ of the male plant to the
female ova.
anther
A chemical signal (neurotransmitter) that travels
between nerve cells is called a __________ _________.
synaptic signal
Programmed cell death is called ________.
apoptosis
, What is the main prerequisite for clearance at the G2
checkpoint?
accurate and complete DNA replication
_________ ______ is all of the cells of a multicellular
organism except the gametes or reproductive cells
somatic cells
__________ in a heterozygote, is the complete and
simultaneous expression of both alleles for the same
characteristic
codominance
The fusing of Golgi vesicles at the metaphase plate of
dividing plant cells forms what structure?
cell plate
What structure is most important in forming the
tetrads?
synaptonemal complex
Which is one of the seven characteristics that Mendel
observed in pea plants?
seed texture
Identical copies of chromatin held together by cohesin
at the centromere are called _____.
sister chromatids
At which stage of meiosis are sister chromatids
separated from each other?
anaphase II
Imagine you are performing a cross involving seed
color in garden pea plants. What F1 offspring would
you expect if you cross true-breeding parents with
green seeds and yellow seeds? Yellow seed color is
dominant over green.
100% yellow seeds
