« previous next »

Author Question: Which of the following would be unexpected in homozygous Hb S? a. High reticulocyte count b. ... (Read 63 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Jun 25, 2018
Which of the following would be unexpected in homozygous Hb S?
 
  a. High reticulocyte count
  b. Hemoglobin A (Hb A)
  c. Elevated hemoglobin F (Hb F)
  d. Hemoglobin that is less soluble

Question 2

What is the most likely causative association between malaria and sickle cell trait?
 
  a. Sickle gene makes people more prone to malaria infection.
  b. Sickle gene prevents Plasmodium ovale infection.
  c. They are both found in Asia.
  d. Sickle gene offers some protection against malaria.


samiel-sayed

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
Both b-globin genes are abnormal in homozygous Hb S. Therefore Hb A is not present unless the patient has received a red cell transfusion. Hb S is less soluble than normal Hb A, the reticulocyte count is elevated, and patients usually have a high Hb F.

Answer to Question 2

ANS: D
Sickle cell trait (heterozygosity for hemoglobin S Hb S) confers resistance against infection with Plasmodium falciparum. It is believed that this is why the abnormal hemoglobin has such high prevalence in areas where this form of malaria is endemic.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations
Deconvolution fluorescence microscopy yields high-resolution optical sections th Deconvolution fluorescence microscopy yields high-resolution optical sections th
High Resolution Logo High Resolution Logo
A high-performance aftermarket air filter often can increase airflow into the engine for more ... A high-performance aftermarket air filter often can increase airflow into the engine for more ...
Cloud Types: High Clouds Cloud Types: High Clouds
Homozygous or heterozygous for the dominant trait? Homozygous or heterozygous for the dominant trait?
Video: Introduction to Herpes

For a complete list of videos, visit our video library