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8471 Biochemistry

Crossing over, true is;

AOccurs during diplotene stage
BBetween non sister chromatids of homologous chromosomes
CBetween sister chromatids of homologous chromosomes
DBetween non homologous chromosomes sister chromatids
Biochemistry
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8475 Biochemistry

A 34-year-old female has a history of intermittent episodes of severe abdominal pain. She has had multiple abdominal surgeries and exploratory procedures with no abnormal findings. Her urine appears dark during an attack and gets even darker if exposed to sunlight. The attacks seem to peak after she takes erythromycin, because of her penicillin allergy. This patient most likely has difficulty in synthesizing which one of the following?

AHeme
BCreatine phosphate
CCysteine
DThymine
Biochemistry
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8476 Biochemistry

Starvation and diabetes mellitus can lead on to ketoacidosis which of the following features is in our of ketoacidosis due to diabetes mellitus.

AIncrease in glucagon/insulin ratio, increased CAMP and increased blood glucose
BDecreased insulin, increased free fatty acid which is equivalent to blood glucose
CDecreased insulin, increased free fatty acid which is not equivalent to blood glucose
DElevated insulin and free fatty acid, equivalent to blood glucose
Biochemistry
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