A neutral atom of chlorine has an atomic number of 17, it has _____electrons in its 3rd shell.
a. 2
b. 17
c. 8
d. 7
Ans: d. 7
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Consider the evolution of metabolic pathways. We believe that these pathways evolved from the
a. precursor to the end product, as enzymes became more efficient over time. b. precursor to the end product, as cells simplified the biochemistry of the external environment. c. end product to the precursor, as cells gradually evolved according to a predetermined plan. d. end product to the precursor, as intermediates in the pathway were depleted in the environment. e. end product to the precursor, as photosynthesis began to supply the energy to power the changes at each stage.
Which process employs exposing cells cultured in the laboratory to DNA with a gene of interest?
a. transformation b. Transfection c. DNA fingerprinting d. polymerase chain reaction e. gel electrophoresis
In criminal cases, if 100% of the banding pattern matches a DNA fingerprint, it is
A. unlikely that the suspect was at the scene of the crime and may be the guilty party. B. highly probable that the suspect was at the scene of the crime but unlikely that he/she is the guilty party. C. unlikely that the suspect was at the scene of the crime. D. highly probable that the suspect was at the scene of the crime and may be the guilty party.
Which of the following is an accessory gland in males?
a. the vestibular gland b. the bulbourethal gland c. the pineal gland d. the pituitary gland