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OAT Practice Biology questions and answers
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OAT Practice Biology questions and answers
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OAT Practice Biology questions and answersQ1: Bryophyta (mosses) - Avascular plants which alternate between haploid and
diploid forms and have flagellated sperm.
Pterophyta (ferns) - Vascular plants which alternate between haploid and diploid
forms and have flagellated sperm
Rhizopoda (amoebas) - Avascular plants which do not alternate between haploid
and diploid forms.
Coniferophyta (pines) - Avascular plants which do not have flagellated sperm.
Angiosperms (flowering plants) - Avascular plants which alternate between
haploid and diploid forms, but do not have flagellated sperm
Q2: Nucleolus - Cellular organelle that is directly responsible for ribosome
synthesis
Endoplasmic Reticulum - Rough ER functions in protein synthesis and Smooth ER
functions in lipid synthesis and detoxification of chemicals.
Mitochondria - Site of aerobic respiration.
,OAT Practice Biology questions and answers
Golgi Apparatus - Modifies new proteins and packages them for distribution
Lysosomes - Function in intracellular digestion of proteins, polysaccharides, fats,
and nucleic acids, as well as obsolete organelles.
Q3: Human Chorionic Gonadotropin (hCG) - Hormone secreted by the embryo
that functions to maintain the corpus luteum.
Estrogen - Produced by the ovary in females, initiates and maintains female sex
characteristics and functions in the development of the uterine lining in
preparation for pregnancy.
Progesterone - Functions in the development of the uterine lining in preparation
for pregnancy along with estrogen.
Androgens - Produced by testis in males and function to initiate and maintain
male sex characteristics and support spermatogenesis.
Insulin - Produced by the pancreas and lowers blood sugar levels.
, OAT Practice Biology questions and answers
Q4: Active Transport - Molecules are moved through the cell membrane against
their concentration gradient with the help of membrane proteins. Since they are
moving against the concentration gradient, ENERGY IS REQUIRED.
Facilitated Diffusion - Molecules are moved through the cell membrane along
their concentration gradient with the help of membrane proteins. Since they are
moving with the gradient, NO ENERGY IS REQUIRED.
Q5: Which of the following is NOT a form of asexual reproduction: External
Fertilization - A form of sexual reproduction as it entails the fusion of female and
male gametes.
Binary Fission - Form of asexual reproduction in which each daughter cell receives
a single copy of the parent's chromosomes.
Budding - Form of asexual reproduction in which a new individual grows out of the
body of a pre-existing organism.
Parthenogenesis - Form of asexual reproduction in which an egg develops in the
absence of fertilization.
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