TLS Online TPP Program

#Question id: 2618


The three genes (lacZ, lacY, and lacA) are transcribed as a single mRNA from the promoter, these genes are expressed at high levels only when

#Unit 2. Cellular Organization
  1. Lactose is available

  2. Glucose, the preferred energy source is available

  3. Three regulatory proteins are involved.

  4. The Lac repressor is encoded by the lacI gene, which is located near the CAP Site.

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TLS Online TPP Program

#Question id: 10928

#Unit 7. System Physiology – Animal

A 40-year-old woman visits the clinic complaining of fatigue. She had recently been treated for an infection. Her laboratory values are RBC 1.8 × 106/μl, Hb 5.2 g/dL, hematocrit (Hct) 15, WBC 7.6 × 103/μl, platelet count 320,000/μl, mean corpuscular volume (MCV) 92 fL, and reticulocyte count 24%. What is the most likely explanation for this presentation?

TLS Online TPP Program

#Question id: 10929

#Unit 7. System Physiology – Animal

Which of the following would describe the condition in a patient with aplastic anemia?


Which of the following is correct?

TLS Online TPP Program

#Question id: 10930

#Unit 7. System Physiology – Animal

A 34-year-old man with schizophrenia has had chronic fatigue for 6 months. He has a good appetite, but has refused to eat vegetables for 1 year because he hears voices saying that vegetables are poisoned. His physical and neurological examinations are normal. His hemoglobin level is 9.1 g/dL, leukocyte count is 10,000/μl3, and MCV is 122. Which of the following is the most likely diagnosis?

TLS Online TPP Program

#Question id: 10931

#Unit 7. System Physiology – Animal

A 24-year-old African-American man comes to the emergency room 3 hr after the onset of severe back and chest pain. These problems started while he was skiing. He lives in Los Angeles and had a previous episode of these symptoms 5 years ago while visiting Wyoming. He is in obvious pain. Laboratory studies show the following:

Hemoglobin                                        11 gm/dl

Leukocyte count                                 22,000/μl3

Reticulocyte count                              25%

What is the diagnosis of this patient?

TLS Online TPP Program

#Question id: 10932

#Unit 7. System Physiology – Animal

A 62-year-old man complains of headaches, visual difficulties, and chest pains. His examination shows a red complexion and a large spleen. His complete blood count follows: hematocrit, 58%, WBC 13,300/μl, and platelets 600,000/μl. His arterial oxygen saturation is 97% on room air. Which of the following would you recommend as a treatment?

TLS Online TPP Program

#Question id: 10933

#Unit 1. Molecules and their Interaction Relevant to Biology

Imidazole ring is the characteristic of which amino acid