One of Chargaff's rules states that
A. A = G and T = C.
B. A = T + G + C.
C. A = C and T = G.
D. A = T and G = C.
Answer: D
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An endocrine gland is a type of organ
A. required for remodeling bone. B. where hormones are produced and then released into the blood. C. where neuronal signals are generated. D. restricted to the production of growth factors. E. None of the choices are correct.
This is an example of _____
1.energy, the capacity to do work
2.activation energy supplied by CO2
3.the effect of temperature and pH on a reaction
4.an electron transfer chain
Which of the following statements about plant tissue culture is false?
A. Individual cells can give rise to whole plants through tissue cultures. B. Synthetic hormones can be used to selectively promote root or shoot formation. C. A callus is a mass of undifferentiated cells. D. Virus-free crop species can be propagated by culturing meristems. E. Callus tissue can only form roots, not shoots.
How is Listeria monocytogenes capable of spreading in the body?
A) The bacteria initiate apoptosis in the cell and spread to other cells in the vesicles that are released from the dying cell. B) After being phagocytized, the bacteria initiates apoptosis in the cell and spreads to other cells in the vesicles that are released from the dying cell. C) Actin in the cytoskeleton propels the bacteria into an adjacent cell. D) It evades the immune system by adhering to cells, being phagocytized, and then breaking out of the phagosome into the cytoplasm. E) The bacteria initiate apoptosis in the cell and spread to other cells in the vesicles that are released from the dying cell, and actin in the cytoskeleton propels the bacteria into an adjacent cell.