Download TOSSUP 1) BIOLOGY Multiple Choice Which of the following

TOSSUP
1) BIOLOGY Multiple Choice Which of the following statements about cellular
signaling is true?
W) Paracrine signaling involves electrical signals triggering neurotransmitter
secretion.
X) In humans, pheromones affect selection of potential mates.
Y) Paracrine signaling use hormones for long-distance signaling.
Z) Growth factors are one class of local regulators used in paracrine signaling.
Answer: Z) Growth factors are one class of local regulators used in paracrine
signaling.
TOSSUP
2) BIOLOGY Multiple Choice What kind of membrane receptor, used primarily in
the nervous system, is used to generate an action potential?
W) G-protein linked receptors
X) Receptor tyrosine kinases
Y) Voltage-gated ion channels
Z) Ligand-gated ion channels
Answer: Y) Voltage-gated ion channels
TOSSUP
3) BIOLOGY Multiple Choice Which of the following statements about chemical
signaling false?
W) Calcium ions are more widely used than cAMP as a second messenger
X) G proteins usually directly affect cellular functions
Y) The conversion of ATP to cAMP is catalyzed by adenylyl cyclase
Z) Drugs such as sidenafil citrate inhibit the hydrolysis of cGMP to GMP
Answer: X) G proteins usually directly affect cellular functions
TOSSUP
4) BIOLOGY Short Answer What blood cells produce the immune response
against foreign antigens and have receptors consisting of Y-shaped molecules
made up of 4 polypeptide chains?
Answer: B cells (prompt on lymphocytes)
TOSSUP
5) BIOLOGY Short Answer What hormone, produced by the pineal gland and
involved in biological rhythms is regulated by light and dark cycles?
Answer: Melatonin
TOSSUP
6) BIOLOGY Short Answer They provide structural support for neutrons and
regulate the extracellular concentrations of ions and neurotransmitters. They also
induce the formation of tight junctions between cells that line the capillaries in the
brain and spinal cord, creating the blood-brain barrier. Name these types of glial
cells, named for their star-like shape.
Answer: Astrocytes
TOSSUP
9) CHEMISTRY Multiple Choice Which of the following statements about
quantum numbers is not true?
W) As the principal quantum number of an electron increases, so does its energy.
X) The azimuthal quantum number of an electron determines the shape of its
orbital
Y) The spin projection quantum number of an electron can be 1
Z) The magnetic quantum number describes subshells
Answer: Y) The spin projection quantum number of an electron can be 1
TOSSUP
10) GEOLOGY Multiple Choice In earthquakes, what type of surface wave is
characterized by a rolling motion along the ground surface?
W) Rayleigh waves
X) Love waves
Y) P-waves
Z) S-waves
Answer: W) Rayleigh waves
TOSSUP
11) COMPUTER SCIENCE Multiple Choice Which programming language was
designed by IBM in the 1950s for scientific and engineering uses?
W) ALGOL
X) Fortran
Y) C++
Z) C#
Answer: X) Fortran
TOSSUP
12) PHYSICS Short Answer What laboratory method is used for separation of
mixtures?
Answer: Chromatography
TOSSUP
13) PHYSICS Short Answer What law states that any two electrons cannot possess
the same 4 quantum numbers?
Answer: Pauli exclusion principle
TOSSUP
14) PHYSICS Short Answer The phenomenon when a superconductor lowered
below its critical temperature exhibits no magnetic field is called what?
Answer: Meissner effect
TOSSUP
15) PHYSICS Short Answer What type of magnetism is the property of an object
which causes it to create a magnetic field in the presence of an externally applied
magnetic field?
Answer: Diamagnetism