PSB Natural Science UPDATED ACTUAL Questions and CORRECT Answers

PSB Natural Science UPDATED ACTUAL
Questions and CORRECT Answers
What is the name for any substance that stimulates the production of antibodies? - CORRECT
ANSWER - antigen


List the cellular hierarchy from the simplest to the most complex structure.

(organism, organ, organ system, cell, tissue) - CORRECT ANSWER - cell, tissue, organ,
organ system, organism


If a cell is placed in a hypertonic solution what will happen to the cell? - CORRECT
ANSWER - it will shrink


Which group of major parts and organs make up the immune system? - CORRECT
ANSWER - lymphatic system, spleen, tonsils, thymus, and bone marrow


The rate of a chemical reaction depends on all the following except
a. temperature
b. surface area
c. presence of catalyst

d. amount of mass loss - CORRECT ANSWER - d. amount of mass loss


Which of the answer choices provided best defines the following statement? For a given mass
and constant temperature, an inverse relationship exists between the volume and pressure of a
gas.
a. Ideal Gas Law
b. Boyle's Law
c. Charles' Law

d. Stefan-Boltzmann Law - CORRECT ANSWER - b. Boyle's Law

,Which of the following statements correctly compares prokaryotic and eukaryotic cells?
a. Prokaryotic cells have a true nucleus, eukaryotic cells don not.
b. Both prokaryotic and eukaryotic cells have a membrane.
c. Prokaryotic cells do not contain membrane-bound organelles, eukaryotic cells do.

d. Prokaryotic cells are more complex than eukaryotic cells. - CORRECT ANSWER - c.
Prokaryotic cells do not contain membrane-bound organelles, eukaryotic cells do.


What is the role of ribosomes?
a. make proteins
b. waste removal
c. transport

d. storage - CORRECT ANSWER - a. make proteins


If an organism is AaBb, which of the following combinations in the gametes is impossible?
a. AB
b. aa
c. aB

d. Ab - CORRECT ANSWER - b. aa


What is the oxidation number of hydrogen in CaH2?
a. +1
b. -1
c. 0

d. +2 - CORRECT ANSWER - b. -1


Which hormone stimulates milk production in the breasts during lactation? - CORRECT
ANSWER - Prolactin

,What is the typical result of mitosis in humans? - CORRECT ANSWER - two diploid cells


Which of the following does NOT exist as a diatomic molecule?
a. boron
b. fluorine
c. oxygen

d. nitrogen - CORRECT ANSWER - a. boron


Which of the following structures has the lowest blood pressure?
a. arteries
b. arteriole
c. venule

d. veins - CORRECT ANSWER - d. veins



How does water affect the temperature of a living thing? - CORRECT ANSWER - Water
keeps temperature stable


What is another name for aqueous HI?
a. hydroiodate acid
b. hydrogen monoiodide
c. hydrogen iodide

d. hydriodic acid - CORRECT ANSWER - d. hydriodic acid


Which of the heart chambers is the most muscular?
a. left atrium
b. right atrium
c. left ventricle

d. right ventricle - CORRECT ANSWER - c. left ventricle

, Which of the following is not a product of the Krebs cycle?
a. carbon dioxide
b. oxygen
c. adenosine triphosphate (ATP)

d. energy carriers - CORRECT ANSWER - b. oxygen


What is the name for the reactant that is entirely consumed by the reaction?
a. limiting reactant
b. reducing agent
c. reaction intermediate

d. reagent - CORRECT ANSWER - a. limiting reactant


Which part of the brain interprets sensory information?
a. cerebrum
b. hindbrain
c. cerebellum

d. medulla oblongata - CORRECT ANSWER - a. cerebrum


What kind of bond connects sugar and phosphate in DNA?
a. hydrogen
b. ionic
c. covalent

d. overt - CORRECT ANSWER - c. covalent


Which of the following proteins is produced by cartilage?
a. actin
b. estrogen