Miller's apparatus synthesized 

A. ammonia.
B. amino acids.
C. carbon dioxide.
D. DNA.


B. amino acids.

Biology & Microbiology

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In a normal cell, cell death typically occurs in which phase of the cell cycle?

A) G1 B) S C) G2 D) M E) all of the above

Biology & Microbiology

Below is a pedigree of a human genetic disease in which solid color indicates affected individuals. Assume that the disease is caused by a gene that can have the alleles A or a. What is/are the possible genotype(s) of person 2?



A) AA
B) Aa
C) Either AA or Aa
D) aa
E) Cannot be determined

Biology & Microbiology

Food poisoning from Salmonella occurs because of ________

A) an exotoxin secreted by Salmonella bacteria B) an endotoxin produced by Salmonella bacteria C) easy transmission between people living in close contact D) extremophile conditions

Biology & Microbiology

In humans, the central nervous system consists of the ________, which is housed in the ________ and the ________, which is housed in the ________.

A. brain; vertebral column; spinal cord; skull B. brain; skull; spinal cord; vertebral column C. spinal cord; vertebral column; sensory neurons; limbs D. peripheral nervous system; limbs; brain; skull

Biology & Microbiology