A microbiologist inoculates a flask of broth with 1 ml of 100 bacterial cells/ml. The generation time of the species is 1 hour, and there is no lag phase. How long will it be before the culture contains more than 6,000 cells/ml?

A) 12 hours
B) 6 hours
C) 2 hours
D) 4 hours
E) 10 hours


B

Biology & Microbiology

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In the TCA cycle, two carbons in the form of ________ are added to oxaloacetate at the start of the cycle.

A. methanol B. acetyl-CoA C. ethanol D. carbon dioxide

Biology & Microbiology

The endoplasmic reticulum is a site for

A) potassium storage in muscle cells. B) drug detoxification by catalase. C) N-linked glycosylation of polypeptides. D) addition of lipid residues. E) both choices B and C

Biology & Microbiology

Besides sending messages to and from the brain, the spinal cord has another important function: Reflexes. In fact, in very simple animals, that is the main function of the cord. In higher animals, reflexes are important because they provide

_____ protection from sudden or unexpected environmental harms. _____ stimulation of the brain as a protection against atrophy in situations where voluntary movement is hindered, such as a coma. _____ objective physical evidence of neurological injury. _____ maintenance of life-sustaining processes such as breathing and heart beat, even while sleeping or unconscious.

Biology & Microbiology

After 3 replication cycles in PCR, there will be a total of 4 double-stranded DNA molecules.

Answer the following statement true (T) or false (F)

Biology & Microbiology