« previous next »

Author Question: The globin chains making up Hb A are: a. Two e and two g chains b. Two V and two e chains c. ... (Read 145 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jun 25, 2018
The globin chains making up Hb A are:
 
  a. Two e and two g chains
  b. Two V and two e chains
  c. Two a and two g chains
  d. Two a and two b chains

Question 2

Which of the following provides a negative feedback for heme synthesis, thus helping to control, by decreasing, its synthesis?
 
  a. Concentration of heme in the developing RBC
  b. Concentration of hemoglobin in blood
  c. Concentration of globin chain in the developing RBC
  d. Number of RBCs in circulation


frogdreck123456

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Hb A is composed of two a and two g chains; V and e chains are embryonic chains and are seen only in fetal life. Hb F is composed of two a and two g chains.

Answer to Question 2

ANS: A
As the concentration of heme increases in the developing RBC, it acts as a negative feedback to decrease further synthesis of heme. This helps control its rate of production.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Structure and formation of the homologous ?-globin genes in mice and rats Structure and formation of the homologous ?-globin genes in mice and rats
The Making of Black Harlem The Making of Black Harlem
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ... (A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
Communication: Making Connections, 11th Communication: Making Connections, 11th
the Beta-globin gene subfamily on chromosome 11 the Beta-globin gene subfamily on chromosome 11
Locus control and developmental expression of human globin–complex genes Locus control and developmental expression of human globin–complex genes
Video: Semidiscontinuous DNA replication

For a complete list of videos, visit our video library