OAT practice test questions and
answers graded A+ 2025 update
proteins can do all of the following except - correct answer ✔✔self-replicate
which statement about cell plasma membrane in eukaryotes is NOT correct -
correct answer ✔✔it contains cytochrome chain of oxidative phosphorylation
according to Darwin's theory of modification by natural selection - correct answer
✔✔organisms that have more favorable traits tend to leave more offspring
Darwin's theory of natural selection to explain evolution can also be referred to as
- correct answer ✔✔descent with modification
agglutinins are antibodies that recognize different blood types, according to the
theory of blood groups, which statement is false - correct answer ✔✔type O-
contains no agglutinins (antigens)
-doesn't have antigens on the surface of O- blood cells but has antigens to A,B,
and Rh
endocrine glands with corresponding hormone secretion - correct answer
✔✔posterior pituitary: ADH and oxytocin
adrenal cortex: aldosterone
anterior pituitary: TSH
,adrenal medulla: epinephrine
hypothalamus: gonadotropin-releasing hormone
steroids - correct answer ✔✔pass through the cell membrane with ease bc they
are lipid-soluble
influencers of enzyme-catalyzed rxns - correct answer ✔✔substrate
concentration, temp, enzyme concentration, pH
cell division - correct answer ✔✔way for multicellular organisms to grow, develop,
repair
chloroplasts descended from - correct answer ✔✔free-living autotrophs
fat - correct answer ✔✔yields most calories/ gram when consumed
imprinting - correct answer ✔✔process where environmental patterns or objects
presented to a developing organism during a brief "critical period" in early life
become accepted permanently as elements of their behavior environment
Hard-Weinberg Equilibrium needs: - correct answer ✔✔random mating, large
gene pool, no change in allelic frequency, no natural or sexual selection
direct transition in pathway of normal blood flow - correct answer ✔✔pulmonary
veins to left atrium
, digestive enzyme elements - correct answer ✔✔digestive enzymes from pancreas
are released va duct into duodenum, peristalsis (smooth muscle contraction that
aids digestion), villi in small intestine absorb nutrients into both lymphatic and
circulatory systems, release of bile from gall bladder is triggered by hormone
cholecystokinin, low pH of stomach is essential for function of ENZYMES that
break down proteins into their aa
in kidneys - correct answer ✔✔antidiuretic hormone causes reabsorption of water
from collecting tubule
placenta is derived from - correct answer ✔✔the chorion and is primarily of fetal
origin
-amnion: surrounds fetus and amniotic fluid
-allantois and yolk sac: give rise to umbilical vessels
-chorion: surrounds them all and gives rise to the placenta
climax community - correct answer ✔✔a relatively stable long-lasting community
within a given climate
to ensure survival of their species, adult animals that don't care for their young -
correct answer ✔✔produce many offspring
site of spermatogenesis - correct answer ✔✔seminiferous tubules
muscle tissue - correct answer ✔✔the sarcoplasmic reticulum regulates the level
of Ca2+ within a muscle cell
answers graded A+ 2025 update
proteins can do all of the following except - correct answer ✔✔self-replicate
which statement about cell plasma membrane in eukaryotes is NOT correct -
correct answer ✔✔it contains cytochrome chain of oxidative phosphorylation
according to Darwin's theory of modification by natural selection - correct answer
✔✔organisms that have more favorable traits tend to leave more offspring
Darwin's theory of natural selection to explain evolution can also be referred to as
- correct answer ✔✔descent with modification
agglutinins are antibodies that recognize different blood types, according to the
theory of blood groups, which statement is false - correct answer ✔✔type O-
contains no agglutinins (antigens)
-doesn't have antigens on the surface of O- blood cells but has antigens to A,B,
and Rh
endocrine glands with corresponding hormone secretion - correct answer
✔✔posterior pituitary: ADH and oxytocin
adrenal cortex: aldosterone
anterior pituitary: TSH
,adrenal medulla: epinephrine
hypothalamus: gonadotropin-releasing hormone
steroids - correct answer ✔✔pass through the cell membrane with ease bc they
are lipid-soluble
influencers of enzyme-catalyzed rxns - correct answer ✔✔substrate
concentration, temp, enzyme concentration, pH
cell division - correct answer ✔✔way for multicellular organisms to grow, develop,
repair
chloroplasts descended from - correct answer ✔✔free-living autotrophs
fat - correct answer ✔✔yields most calories/ gram when consumed
imprinting - correct answer ✔✔process where environmental patterns or objects
presented to a developing organism during a brief "critical period" in early life
become accepted permanently as elements of their behavior environment
Hard-Weinberg Equilibrium needs: - correct answer ✔✔random mating, large
gene pool, no change in allelic frequency, no natural or sexual selection
direct transition in pathway of normal blood flow - correct answer ✔✔pulmonary
veins to left atrium
, digestive enzyme elements - correct answer ✔✔digestive enzymes from pancreas
are released va duct into duodenum, peristalsis (smooth muscle contraction that
aids digestion), villi in small intestine absorb nutrients into both lymphatic and
circulatory systems, release of bile from gall bladder is triggered by hormone
cholecystokinin, low pH of stomach is essential for function of ENZYMES that
break down proteins into their aa
in kidneys - correct answer ✔✔antidiuretic hormone causes reabsorption of water
from collecting tubule
placenta is derived from - correct answer ✔✔the chorion and is primarily of fetal
origin
-amnion: surrounds fetus and amniotic fluid
-allantois and yolk sac: give rise to umbilical vessels
-chorion: surrounds them all and gives rise to the placenta
climax community - correct answer ✔✔a relatively stable long-lasting community
within a given climate
to ensure survival of their species, adult animals that don't care for their young -
correct answer ✔✔produce many offspring
site of spermatogenesis - correct answer ✔✔seminiferous tubules
muscle tissue - correct answer ✔✔the sarcoplasmic reticulum regulates the level
of Ca2+ within a muscle cell
