MTTC 103 Biology Competency Test Preparation |
Elementary Education Approved Questions & Answers
2025/2026
Monophyodonts - correct Answer organisms having one set of teeth which are
not replaced at later stages of life
Heterodonts - correct Answer organisms which possess different types of teeth
Polyphodonts - correct Answer organisms whose teeth are continuously
replaced
Catchment area - correct Answer the area where the net water movement is
from the surface to the ground water system
Spring - correct Answer an area where ground water reaches the surface and
runs off
Aquifer - correct Answer the rocky body through which ground water flows
Artesian well - correct Answer a well drilled into an aquifer that has sufficient
hydrostatic pressure to force water up into it
Savanna - correct Answer tropical grasslands; located near the equator;
scattered with shrubs and isolated trees; covers aprox. 20% of earth's land area
Primary structure of a protein - correct Answer Proteins which have linear
sequence of amino acids in a polypeptide chain held together by peptide or
covalent bonds
,Secondary structure of a protein - correct Answer the folding of primary
sequence amino acids into specific strictures which are bound together by
hydrogen bonds (alpha helix or beta sheet)
Tertiary structure of a protein - correct Answer The three dimensional structure
of a protein as the secondary structure wraps around and connects using
disulfide bonds
Quaternary structure of proteins - correct Answer the joining of multiple sub-unit
proteins
Location dependent sex determination - correct Answer seen in worm and snail-
like species. In Crepidula fornicata, individuals pile on top of one another to form
a mound. They begin male and then can either become male or female
depending on what the sex is of the snail it is on top of.
Temperature dependent sex determination - correct Answer seen in reptiles
such as turtles and crocodiles. Sex is determined by the temperature of the eggs
during a certain period of development; low temps produce one sex, whereas
high temps will produce the other.
Plasma - correct Answer A straw-yellow colored fluid which constitutes 55% of
blood, it circulates dissolved nutrients such as glucose, amino acids, and fatty
acids and removes waste products. It is an aqueous solution consisting of 90-
93% water.
Nitrogen-fixing bacteria - correct Answer Azobacter (lives in soil); anabaena,
nostoc and calothrixlives (live in water and on moist rocks)
Irreversible inhibitors - correct Answer modify or denature enzymes irreversibly
, Glucocorticoids - correct Answer produced by the adrenal cortex. They are a
class of steroid hormones that bind to the glucocorticoid receptor and stimulate
glucogenesis and increase blood glucose levels.q
Nissl's Granules - correct Answer present in the cell body of the neuron, they
are the site of protein synthesis in neurons and are made of rough ER and
ribosome. It was named after Franz Nissl
Rhizobium - correct Answer lives in the root of legumes and forms nodules. It
helps to fix atmospheric nitrogen in leguminous plants.
Commensalism - correct Answer a type of association in which one organism
benefits and the other is unaffected
Elastase - correct Answer secreted by the pancreas; breaks down elastin
Carboxypeptidase - correct Answer secreted by the pancreas; cleaves peptide
bonds at the carboxyl terminal
Ribonuclease - correct Answer secreted by the pancreas, cleaves RNA
molecules
Nematocysts - correct Answer sub-cellular organelles found in cnidocytes
(aquatic and marine animals) that carry toxic substances.
Juxtacrine signaling - correct Answer intercellular communication in which cells
communicate through direct contact
Endocrine signaling - correct Answer occurs between cells that are present over
large distances
Elementary Education Approved Questions & Answers
2025/2026
Monophyodonts - correct Answer organisms having one set of teeth which are
not replaced at later stages of life
Heterodonts - correct Answer organisms which possess different types of teeth
Polyphodonts - correct Answer organisms whose teeth are continuously
replaced
Catchment area - correct Answer the area where the net water movement is
from the surface to the ground water system
Spring - correct Answer an area where ground water reaches the surface and
runs off
Aquifer - correct Answer the rocky body through which ground water flows
Artesian well - correct Answer a well drilled into an aquifer that has sufficient
hydrostatic pressure to force water up into it
Savanna - correct Answer tropical grasslands; located near the equator;
scattered with shrubs and isolated trees; covers aprox. 20% of earth's land area
Primary structure of a protein - correct Answer Proteins which have linear
sequence of amino acids in a polypeptide chain held together by peptide or
covalent bonds
,Secondary structure of a protein - correct Answer the folding of primary
sequence amino acids into specific strictures which are bound together by
hydrogen bonds (alpha helix or beta sheet)
Tertiary structure of a protein - correct Answer The three dimensional structure
of a protein as the secondary structure wraps around and connects using
disulfide bonds
Quaternary structure of proteins - correct Answer the joining of multiple sub-unit
proteins
Location dependent sex determination - correct Answer seen in worm and snail-
like species. In Crepidula fornicata, individuals pile on top of one another to form
a mound. They begin male and then can either become male or female
depending on what the sex is of the snail it is on top of.
Temperature dependent sex determination - correct Answer seen in reptiles
such as turtles and crocodiles. Sex is determined by the temperature of the eggs
during a certain period of development; low temps produce one sex, whereas
high temps will produce the other.
Plasma - correct Answer A straw-yellow colored fluid which constitutes 55% of
blood, it circulates dissolved nutrients such as glucose, amino acids, and fatty
acids and removes waste products. It is an aqueous solution consisting of 90-
93% water.
Nitrogen-fixing bacteria - correct Answer Azobacter (lives in soil); anabaena,
nostoc and calothrixlives (live in water and on moist rocks)
Irreversible inhibitors - correct Answer modify or denature enzymes irreversibly
, Glucocorticoids - correct Answer produced by the adrenal cortex. They are a
class of steroid hormones that bind to the glucocorticoid receptor and stimulate
glucogenesis and increase blood glucose levels.q
Nissl's Granules - correct Answer present in the cell body of the neuron, they
are the site of protein synthesis in neurons and are made of rough ER and
ribosome. It was named after Franz Nissl
Rhizobium - correct Answer lives in the root of legumes and forms nodules. It
helps to fix atmospheric nitrogen in leguminous plants.
Commensalism - correct Answer a type of association in which one organism
benefits and the other is unaffected
Elastase - correct Answer secreted by the pancreas; breaks down elastin
Carboxypeptidase - correct Answer secreted by the pancreas; cleaves peptide
bonds at the carboxyl terminal
Ribonuclease - correct Answer secreted by the pancreas, cleaves RNA
molecules
Nematocysts - correct Answer sub-cellular organelles found in cnidocytes
(aquatic and marine animals) that carry toxic substances.
Juxtacrine signaling - correct Answer intercellular communication in which cells
communicate through direct contact
Endocrine signaling - correct Answer occurs between cells that are present over
large distances
