DNA that has been liberally labeled with radioactive 14C is used as the template for replication. Replication is carried out in a medium containing only unlabeled nucleotides. After two rounds of replication, what percent of DNA molecules are still labeled?

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#Question id: 28863

#Unit 2. Cellular Organization

Melanophores are cells of the vertebrate skin that contain hundreds of dark melanin-filled pigment granules called melanosomes. Melanophores either have their melanosomes dispersed or aggregated by__

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#Question id: 28972

#Unit 7. System Physiology – Animal

hormones of adrenal cortex are derivatives of cholesterol convert to pregnenolone is catalyzed by enzymes in mitochondria, known as__ 

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#Question id: 5832

#Unit 8. Inheritance Biology

Mutagenic agents that can cause cancer are known specifically as:

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#Question id: 2072

#Unit 2. Cellular Organization

Which of the following structures would decrease the electrochemical gradient across a membrane?

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#Question id: 11754

#Unit 7. System Physiology – Animal

Use the following clinical laboratory test results:

Urine flow rate = 1 ml/min

Urine inulin concentration = 100 mg/ml

Plasma inulin concentration = 2 mg/ml

Urine urea concentration = 50 mg/ml

Plasma urea concentration = 2.5 mg/ml

What is the net urea reabsorption rate?