Chapter 3 Review Q's
How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid?
3 (code signals the use of a particular amino acid.)
Which of the following sequences on a DNA molecule would be complementary to GCTTATAT? (A pairs w/T) (C pairs w/G) TAGGCGCG ATCCGCGC CGAATATA TGCCTCTC
CGAATATA
Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome
DNA, nucleosome, chromatin, chromosome
What phase is characterized by preparation for DNA synthesis?
G1 (synthesis phase)
What a feature common to all three components of the cytoskeleton?
They are all polymers of protein subunits.
A mutation in the gene for a cyclin protein might result in what?
a cell with less or more genetic material than normal, cancer
. The nucleus and mitochondria share what feature?
a double cell membrane
. Ion pumps and phagocytosis are both examples of ________.
active transport
Which of the following is part of the elongation step of DNA synthesis? pulling apart the two DNA strands attaching complementary nucleotides to the template strand untwisting the DNA helix none of the above
attaching complementary nucleotides to the template strand (stage 2 elongation)
What multipotent stem cells from children sometimes banked by parents?
cells from the umbilical cord and from baby teeth
The diffusion of substances within a solution tends to move those substances ________ their ________ gradient.
down; concentration
Which type of stem cell gives rise to red and white blood cells?
hematopoietic
Because they are embedded within the membrane, ion channels are examples of ________.
integral proteins
Which organelles produces large quantities of ATP when both glucose and oxygen are available to the cell?
mitochondria
Transcription and translation take place in the ________ and ________, respectively.
nucleus;cytoplasm
Diffusion is to ________ as endocytosis is to ________.
osmosis; pinocytosis
Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency.
pleuripotency, multipotency, oligopotency, unipotency
What a function of the rough ER?
production of proteins
The rough ER has its name due to what associated structures?
ribosomes
Which of the following structures could be found within the nucleolus?
ribosomes
What is a primary function of tumor suppressor genes?
stop certain cells from dividing
Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to ________.
the water
