Salivary Amylase is an Enzyme in humans that breaks down starches. What substance would humans have difficulty digesting without this enzyme?
Lipids
Nucleic Acids
Proteins
Carbohydrates
Carbohydrates
According to the Law of Conservation of Mass, the number of atoms in the products of a chemical reaction is…
The same as the number of atoms in the reactants
Greater than the number of atoms in the reactants
Less than the number of atoms in the reactants
The same as the number of molecules in the reactants
The same as the number of atoms in the reactants
Which of the following lists the atmospheric layers in order (From closest to Earth → farthest)?
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere
Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere
Thermosphere, Troposphere, Mesosphere, Stratosphere, Exosphere
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
Which of the following is Newton’s 2nd Law of Motion?
The force acting on an object is equal to the mass multiplied by its acceleration
A body at rest remains at rest and a body in motion remains in motion unless acted upon by an external force
Every action has an equal and opposite reaction
The acceleration of smaller objects is greater than that of larger objects
The force acting on an object is equal to the mass multiplied by its acceleration
While traveling in an elliptical orbit around the sun, Mars gains speed during the part of its orbit where Mars is getting closer to the Sun. Which of the following can be used to explain this gain in speed?
As Mars gets closer to the sun, The Mars-Sun system loses potential energy and Mars gains kinetic energy
A component of the gravitational force exerted on Mars is perpendicular to the direction of motion, causing acceleration and a gain in speed along that direction
The torque exerted on Mars by the Sun during this segment of the orbit increases the Mars-Sun system’s angular momentum
The centripetal force exerted on Mars is greater than the gravitational force during this segment of the orbit, causing Mars to gain speed as it gets closer to the Sun
As Mars gets closer to the sun, The Mars-Sun system loses potential energy and Mars gains kinetic energy
What does tRNA deliver to Ribosomes during Translation?
Amino Acids
DNA
mRNA
Proteins
Deoxyribonucleic Acid
Which phase of matter has the greatest particle motion?
Gas
Liquid
Plasma
Solid
Gas
Volcanoes are formed at which plate boundary?
Divergent
Transform
Convergent
Bypass
Convergent
What is the frequency of a wave that travels 20 meters per second with a wavelength of 200 meters?
4000 Hz
.10 Hz
4.0 Hz
10 Hz
.10 Hz
Work done by Earth’s gravitational force on a system is 0 Joules. Which of the following statements must be true? (CHOOSE 2)
The system could have returned to its initial height after some time
The system may not have accelerated due to Earth’s gravitational force
The system could be travelling parallel to Earth’s surface
The system could have experienced equal and opposite work on it due to some other source
1. The system could have returned to its initial height after some time
3. The system could be travelling parallel to Earth’s surface
Which of the following processes results in the most genetic variation?
Sexual Reproduction
Asexual Reproduction
Mitosis
Cloning
Sexual Reproduction
What is the process of splitting an atom?
Decomposition
Fission
Fusion
Single-Replacement
Fission
This type of front pushes cold air down
Cold
Warm
Stationary
Occluded
Warm
On the electromagnetic spectrum, Visible Light is between which 2 types of light?
Gamma and X-Ray
X-Ray and Ultraviolet
Ultraviolet and Infrared
Infrared and Microwave
Ultraviolet and Infrared
The maximum mass that can be hung vertically from a string without breaking is 10 kg. A length of this string that is 2 meters long is used to rotate a .5 kg object in a circle on a frictionless table with the string horizontal. The maximum speed that the mass can attain under these conditions without the string breaking is most nearly…
5 m/s
10 m/s
14 m/s
20 m/s
20 m/s
A new mutation that arose in 1 copy of Gene X in a Somatic Cell resulted in the formation of a tumor. Which piece of evidence best describes how the mutation caused the tumor?
Protein X normally stimulates Cell Division. The mutation created an overactive version of Protein X
Protein X normally activates a growth hormone receptor. The mutation decreased Protein X’s stability
Protein X normally prevents passage through the cell cycle. The mutation created an overactive version of Protein X
Protein X normally regulates gene expression. The mutation created an underactive version of Protein X that blocked the cell cycle
Protein X normally stimulates Cell Division. The mutation created an overactive version of Protein X
Which of the following gases has the weakest attractive forces between particles?
CO2
He
NO
HCI
He
In which stage of the Nitrogen cycle do soil bacteria convert Ammonium Ions into Nitrate Ions, a form of Nitrogen usable by plants?
Nitrogen Fixation
Nitrification
Assimilation
Ammonification
Denitrifcation
Nitrification
Which of the following is the 1st Law of Thermodynamics?
Energy can’t be created or destroyed. It only changes forms
Entropy of an isolated system always increases
Entropy of a system approaches a constant as temperature approaches Absolute Zero
2 systems in Equilibrium with a 3rd system are in thermal equilibrium with each other
Energy can’t be created or destroyed. It only changes forms
An object moving on a horizontal, frictionless surface makes a glancing collision with another object initially at rest on the surface. In this case, which of the following is true about momentum and kinetic energy?
Momentum is always conserved and Kinetic energy may be conserved
Kinetic energy is always conserved and Momentum may be conserved
Momentum is always conserved and Kinetic energy is never conserved
Both Momentum and Kinetic energy are always conserved
Momentum is always conserved and Kinetic energy may be conserved
Organisms that reproduce sexually exhibit zygotic, gametic, or sporic meiosis. One way to determine the type of life cycle an organism has is by…
Observing Embryonic Development
Comparing the Diploid and Haploid forms of the organism
Determining when Fertilization occurs in the life cycle
Determining if Gametes are multicellular or unicellular
Comparing the Diploid and Haploid forms of the organism
NH3 (l) is brought to its boiling point. Which of the following will occur?
The N-H bonds within the molecule breaks apart
The overall temperature of the solution rises as the molecules speed up
The amount of energy within the system remains constant
The Hydrogen bonds break apart
The Hydrogen bonds break apart
This Endocrine Disruptor is commonly used in water bottles and food packaging.
Bisphenol A
Alkylphenols
Halogenated Aromatic Hydrocarbons
Brominated Flame Retardants
Bisphenol A
Which of the following is the SI unit for Electric Current?
Joule
Hertz
Amp
Candela
Amp
A proton moving along the positive x-axis enters an electric field that is directed along the positive y-axis. What is the direction of the electric force acting on the proton after it enters the electric field?
Along the negative z-axis
Along the positive z-axis
Along the negative y-axis
Along the positive y-axis
Along the positive y-axis