If a cell has 18 chromosomes and undergoes mitosis, how many chromosomes would each daughter cell have?
A) 36 B) 18 C) 9 D) 72
Answer: B
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Some insecticides, such as chlorpyrifos, work by inhibiting the enzyme acetylcholinesterase (AChE), which normally breaks down the neurotransmitter acetylcholine. Where does this insecticide most likely bind to inhibit the enzyme's activity?
A. The part of an enzyme that combines with acetlycholine B. It does not need to bind with the enzyme directly C. A sequence of DNA nucleotides that encodes the AChE enzyme protein molecule D. Any location on the amino acid chain that forms the AChE enyzme
The Contraceptive Pill contains ________.
A. FSH B. progesterone C. estrogen D. estrogen and progesterone
The DNA segment that carries information for building one protein or polypeptide chain is called a(n) ________
A) codon B) gene C) anticodon D) amino acid
Parallel curving ridges of dermis that shape the overlying epidermis into fingerprints
A. improve the grip of the hands. B. are caused by the pattern of the reticular layer of the dermis. C. are associated with thin skin. D. decrease friction on surfaces where they are located. E. tend to make the surface smooth.