Protein synthesis occurs on/in the
A. nucleus.
B. ribosome.
C. inclusion.
D. cytoskeleton.
E. periplasmic space.
Answer: B
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The digestive system of most animals is lined with cells through which nutrients are absorbed. What is the embryonic origin of these cells?
A) endoderm B) ectoderm C) mesoderm
Scientists develop a chemical that binds to molecules that make quorum sensing possible, rendering those molecules non-functional. If this chemical is incorporated into a mouthwash, how would it affect the community of bacteria that cause dental plaque?
A. Their negative effects would be reduced because they will no longer be able to produce mucilage and stick to teeth. B. Their negative effects would be reduced because they will no longer be able to produce the acid that damages teeth. C. Their negative effects would be increased because it will cause them to produce mucilage, allowing them to stick to teeth. D. Their negative effects would be increased because it will cause them to produce the acid that damages teeth. E. It would have no effect because they will still be able to form a biofilm and secrete the acid that damages teeth.
Carriers of Hepatitis B virus are not common.
Answer the following statement true (T) or false (F)
The outer layer of skin is mostly ____
epithelium. a. simple squamous b. simple cuboidal c. stratified squamous d. simple columnar e. stratified cuboidal