PSB Practice Test Questions & Answers 2024/2025
What is the name for any substance that stimulates the production of antibodies? - ANSWERSantigen
What is the correct cellular hierarchy from the simplest to the most complex structure? - ANSWERScell
tissue
organ
organ system
organism
I...
What is the name for any substance that stimulates the production of antibodies? - ANSWERSantigen
What is the correct cellular hierarchy from the simplest to the most complex structure? - ANSWERScell
tissue
organ
organ system
organism
If a cell is placed in a hypertonic solution, what will happen to the cell? - ANSWERSIt will shrink.
What are major parts and organs that make up the immune system? - ANSWERSlymphatic system
spleen
tonsils
thymus
bone marrow
The rate of a chemical reaction depends on all the following except?
a. temperature
b. surface area
c. presence of catalysts
d. amount of mass lost - ANSWERSamount of mass loss
For a given mass and constant temperature, an inverse relationship exists between the volume and
pressure of a gas - ANSWERSBoyle's Law
,Compare prokaryotic and eukaryotic cells - ANSWERSProkaryotic cells don't contain membrane-bound
organelles, eukaryotic cells do
What is the role of ribosomes? - ANSWERSmake proteins
If an organism is AaBb, what combinations in the gametes is impossible? - ANSWERSaa
What is the oxidation number of hydrogen in CaH2? - ANSWERS-1
Which hormone stimulates milk production in the breast during lactation? - ANSWERSprolactin
What is the typical result of mitosis in humans? - ANSWERS2 diploid cells
Which of the following does not exist as a diatomic molecule?
a. boron
b.fluorine
c.oxygen
d.nitrogen - ANSWERSboron
What structure has the lowest blood pressure? - ANSWERSvein
How does water affect the temperature of a living thing? - ANSWERSWater keeps temp stable
What is another name for aqueous HI? - ANSWERShydriodic acid
What heart chamber is the most muscular? - ANSWERSleft 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 - ANSWERSoxygen
What is the name for the reactant that's entirely consumed by the reaction? - ANSWERSlimiting reactant
Which part of the brain interprets sensory information? - ANSWERScerebrum
What kind of bond connects sugar and phosphate in DNA? - ANSWERScovalent
What is the mass (in grams) of 7.35 mol water? - ANSWERS132g
Which of the following proteins is produced by cartilage?
a.actin
b.estrogen
c.collagen
d.myosin - ANSWERScollagen
How are lipids different than other organic molecules? - ANSWERSThey are not water soluble.
Which of the following orbitals is the last to fill?
a. 1s
b. 3s
c. 4p
d. 6s - ANSWERS6s
Which component of the nervous system is responsible for lowering the heart rate? -
ANSWERSparasympathetic nervous system
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