OAT Online Practice Questions and Answers
A circuit contains a 2 and a 5 resistor, connected in parallel to each other. What is the equivalent resistance in this circuit?
A. 7
B. 10
C. 0.7
D. 10/7
E. 5/2
Which of the following structure and function are linked incorrectly below?
A. Epididymis – stores sperm
B. Oviduct – site of fertilization
C. Vas deferens – transports the sperm to the urethra
D. Seminal vesicles – gives sperm alkaline based protection to neutralize acidity of vagina
E. None of the above
Which of the following is a component of bacterial cell wall?
A. Chitin
B. Cellulose
C. Peptidoglycan
D. All of the above
E. None of the above
Which of the following types of muscles possesses striations?
A. Skeletal
B. Smooth
C. Cardiac
D. A and B
E. A and C
In photosynthesis, high-energy electrons move through electron transport chains to produce ATP and NADPH. Which of the following provides the energy to create high energy electrons?
A. O2
B. Light
C. Water
D. NADP+
E. NADH
Darwin's idea that evolution occurs by the gradual accumulation of small changes can be summarized as:
A. Convergent evolution
B. Adaptive radiation
C. Punctuated equilibrium
D. Phyletic gradualism
E. Sympatric speciation
Chlorophyll is associated with which of the following metals?
A. Zinc
B. Iron
C. Magnesium
D. Silver
E. Manganese
Which of the following hormones is incorrectly matched to its function?
A. Oxytocin – Acts on mammary glands allowing milk letdown.
B. GRH – Stimulates anterior pituitary to release FSH and LH.
C. TRH – Causes thyroid to secrete hormones T3 and T4.
D. Thyroxine – regulates metabolism via controlling the oxidation rate of cells.
E. Parathyroid Hormone – Increases blood levels of calcium.
Which of the following statements regarding chemiosmosis in mitochondria is not correct?
A. ATP synthase is powered by protons flowing through membrane channels.
B. Energy from ATP is used to transport protons to the intermembrane space.
C. Energy from the electron transport chain is used to transport protons to the intermembrane space.
D. An electrical gradient and a pH gradient both exist across the inner membrane.
E. The waste product of chemiosmosis is water.
