Biology
What is the most appropriate term for the genetic character of an organism having a pair of identical alleles for a certain trait:
W) dominant X) recessive Y) homozygous Z) heterozygous
homozygous
r In addition to iron, what 2 substances must be present for iron to rust?
oxygen and water
which of the following is a sedimentary rock:
1. slate
2. marble
3. basalt
4. sandstone
sandstone
Which of the following is closest to the maximum horsepower a healthy person can briefly generate?
W) 0.25 X) 0.5 Y) 1 Z) 2
1
A constant force acting on a body experiencing no change in. its environment will give the body:
1. constant acceleration
2. constant speed
3. constant velocity
4. zero acceleration
constant acceleration
A realized ecological niche [NICH] includes all but which of the following?
W) Resource requirements X) Range of tolerance Y) Geographical location Z) Competitors
geographical location
To the nearest whole degree Celsius, at what temperature is water the densest?
4
What process is responsible for the remineralization of organic carbon, returning it to its inorganic state, within a timeframe shorter than geologic timescales?
decomposition
Chlorophyll undergoes which of the following types of reaction when it is activated by light?
W) Reduction X) Oxidation Y) Hydrolysis [hy-DROL-uh-sis] Z) Phosphorylation [FOS-fer-uh-lay-shuhn]
oxidation
A 10 kilogram object falls to the surface of a planet where the acceleration due to gravity is 6.5 meters per second squared. If the object is falling at terminal velocity, what is the drag force on the object in newtons?
65
What is the biological term most often used for the act of cell engulfing a particle by extending its pseudopodia around the particle?
phagocytosis
infrared spectroscopy typically analyzes which of the following?
W) Electronic excitement X) Nuclear spins Y) Molecular vibrations Z) Atomic rotation
Molecular Vibrations
Where in the interstellar medium are stars believed to form?
W) Giant molecular clouds X) Warm-hot interstellar medium Y) H I regions Z) H II regions
Giant molecular clouds
Approximately how many pounds of coal are required to light a 100 watt light bulb for one year?
W) 325 X) 450 Y) 575 Z) 700
700
In a totally inelastic collision, what happens to the two colliding objects?
they stick together
What molecule in the lac operon exerts its control by inactivating the repressor?
allolactose
What is the only amino acid that is not optically active?
glycine
In the early part of the 20th century, the German geologist and meteorologist Alfred Wegener introduced what theory?
Continental drift
When a 10 kilogram object is lifted 10 meters, in a gravitational field of 9.8 meters per second squared, what is the change in potential energy of the object in joules?
980
For a uniformly rotating object, what do we call the rate of change in the angle through which the object turns in one second?
angular velocity (speed)
Which of the following is the most effective allosteric inhibitor of enzymes such as phosphofructokinase in glycolysis:
W) ADP X) ATP Y) cyclic AMP Z) NAD+
ATP
Most of the peptide chains in a myoglobin molecule adopt what secondary structure?
helix
What two oxygen isotopes are most commonly compared to examine past temperatures recorded in glacial ice?
oxygen-16 and oxygen-18
Taking g as 10 meters per second squared and assuming there is no friction, at about what height in meters must a 100 kilogram roller coaster start from rest in order to achieve a speed of 100 meters per second at the bottom?
500
What are the respective frequencies of the second and third harmonics of a string with a fundamental frequency of 262 hertz?
524 and 786