Out of the following what usually supports the fastest growth rate and is therefore considered the preferred nitrogen source for E. coli

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#Question id: 4362

#3. Fundamental Processes

How are bacteria able to change their patterns of protein synthesis so quickly in response to environmental changes?

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#Question id: 5763

#8. Inheritance Biology

A mutation that causes a mutant phenotype only under restrictive conditions

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#Question id: 10968

#7. System Physiology – Animal

Which of the following is TRUE concerning erythroblastosis fetalis (hemolytic disease of the newborn, HDN)?

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#Question id: 23402

#Aptitude

Policeman wears a uniform because

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#Question id: 16118

#7. System Physiology – Animal

Following statements are regarding to the heat production by the activation of sympathetic nervous system.

A. Activation is stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

B. Activation is stimulation of α2 receptors in brown fat, which increases metabolic rate and heat production.

C. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasoconstriction. Vasoconstriction reduces blood flow to the surface of the skin.

D. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasodilation. Vasodilation reduces blood flow to the surface of the skin.

Which of the following combination is correct?