exam 3
any of the above
A mutation in the gene for a cyclin protein might result in which of the following? a. a cell with additional genetic material than normal b. cancer c. a cell with less genetic material than normal d. any of the above
pleuripotency, multipotency, oligopotency, unipotency
Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency.
integral proteins
Because they are embedded within the membrane, ion channels are examples of ________.
osmosis; pinocytosis
Choose the answer that best completes the following analogy: Diffusion is to ________ as endocytosis is to ________.
Higher temperatures speed up diffusion because molecules have more kinetic energy at higher temperatures.
How does temperature affect diffusion rate, and why?
3
How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid?
active transport
Ion pumps and phagocytosis are both examples of ________.
DNA, nucleosome, chromatin, chromosome
Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome
down; concentration
The diffusion of substances within a solution tends to move those substances ________ their ________ gradient.
a double cell membrane
The nucleus and mitochondria share which of the following features?
ribosomes
The rough ER has its name due to what associated structures?
nucleus; cytoplasm
Transcription and translation take place in the ________ and ________, respectively.
They separate and move and are free to join translation of other segments of mRNA.
What happens to the small and large ribosomal subunits at the end of translation?
stop certain cells from dividing
What is a primary function of tumor suppressor genes?
Processing, packaging, and moving materials manufactured by the cell.
What is the primary role of the endomembrane system?
cells from the umbilical cord and from baby teeth
What multipotent stem cells from children sometimes banked by parents?
an enzyme
What separates the base pair at the start of DNA replication?
the spindle
What structures form during prophase?
They are all polymers of protein subunits.
Which of the following is a feature common to all three components of the cytoskeleton?
production of proteins
Which of the following is a function of the rough ER?
DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars
Which of the following is not a difference between DNA and RNA? a. DNA contains thymine whereas RNA contains uracil b. DNA contains deoxyribose and RNA contains ribose c. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars d. RNA is single stranded and DNA is double stranded
the intron
Which of the following is not made out of RNA? a. the carriers that shuffle amino acids to a growing polypeptide strand b. the ribosome c. the messenger molecule that provides the code for protein synthesis d. the intron
attaching complementary nucleotides to the template strand
Which of the following is part of the elongation step of DNA synthesis? a. pulling apart the two DNA strands b. attaching complementary nucleotides to the template strand c. untwisting the DNA helix d. none of the above
mitochondria
Which of the following organelles produces large quantities of ATP when both glucose and oxygen are available to the cell?
CGAATATA
Which of the following sequences on a DNA molecule would be complementary to GCTTATAT?
ribosomes
Which of the following structures could be found within the nucleolus?
G1
Which phase is characterized by preparation for DNA synthesis?
hematopoietic
Which type of stem cell gives rise to red and white blood cells?
the water
Choose the term that best completes the following analogy: Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to ________.
