Who contributes to the stability of DNA helix structure?

A. Hydrogen bonding between bases

B. Hydrogen bonding between water and bases

C. Scattering interactions between bases

D. Stacking interactions between bases

CORRECT combination is

#Question id: 10956

#Unit 7. System Physiology – Animal

The coagulation pathway that begins with tissue thromboplastin is

#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?

#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?

#Question id: 5687

#Unit 8. Inheritance Biology

The error in meiosis that produces a 47,XYY karyotype is best  described by

#Question id: 5688

#Unit 8. Inheritance Biology

Which of the following are not cause of aneuploidy

#Question id: 5690

#Unit 8. Inheritance Biology

Species I is diploid (2n =4) with chromosomes AABB; related species II is diploid (2n = 6) with chromosomes MMNNOO .Which of the following chromosome  in allotriploid individuals?