Biology
Which of the following is true about prokaryotic cells?
A) They lack DNA
B) They lack chromosomes
C) They have no nucleus
D) Both B & C
E) None of the above
D) Both B & C!
- They lack chromosomes
- They have no nucleus
This law states that in a chemical reaction, the total mass of the reactants equals the total mass of the products
The Law of Conservation of Mass
This term refers to the rate of change of velocity of an object and is a vector quantity, indicating both magnitude and direction.
Acceleration
What three components do nucleotides always consist of?
A phosphate group, a pentose sugar, and a nitrogenous base.
This British naturalist is best known for his theory of evolution by natural selection, which he outlined in his landmark 1859 work, "On the Origin of Species."
Charles Darwin
The Krebs Cycle takes place in which double-membrane bound organelle?
The mitochondria
This type of chemical bond involves the sharing of electrons.
Covalent bond
This quantity is defined as the product of an object's mass and its velocity, and it is a vector that describes the motion of an object.
Momentum
Avogadro's number is a fundamental constant in chemistry that represents the number of atoms, molecules, or particles in one mole of a substance. What is the numerical value of this constant?
6.022 x 10^23
DAILY DOUBLE
Alexander Fleming discovered what antibiotic?
Penicillin
Creutzfeldt–Jakob disease and kuru are nasty diseases believed to be caused by what misfolded P-word proteins?
Prions
This principle states that in a chemical reaction at equilibrium, an external change will cause the system to shift in a direction that counteracts that change.
Le Chatelier's Principle
This phenomenon occurs when waves bend around obstacles or spread out after passing through narrow openings, often leading to interference patterns.
Diffraction
What is the constant 3.00 x 10^8 m/s known for being?
The speed of light
This planet spins clockwise on its axis
Venus
What is the role of cholesterol in membranes?
Influences membrane fluidity and permeability to some solutes!
DAILY DOUBLE!
This type of intermolecular force is the weakest and arises from temporary dipoles that occur when electron density fluctuates around an atom or molecule, influencing the physical properties of substances.
London Dispersion Forces
This law describes the relationship between the force applied to an object and its acceleration, stating that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
The acceleration due to gravity is defined by this constant in meters/second^2
9.80 m/s^2
How many hearts does an octopus have?
3 hearts
Which gene in the lac operon codes for β-galactosidase?
A. LacY
B. LacZ
C. LacA
LacZ
This type of organic chemistry reaction involves the removal of two atoms or groups of atoms from a molecule, forming a double or triple bond.
Elimination Reaction
This phenomenon occurs when a wave's frequency changes due to the relative motion between the source and an observer, often heard in the context of sound waves from a moving vehicle.
The Doppler Effect
This is the biological process of maintaining a constantly stable internal environment.
Homeostasis
Which inventor/engineer invented alternating current (AC), an electric current that periodically reverses direction and changes its magnitude continuously with time?
Nikola Tesla