« 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 369 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?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

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 people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

One-dimensional NMR spectrum of a globin from a marine blood worm One-dimensional NMR spectrum of a globin from a marine blood worm
The Making of Black Harlem The Making of Black Harlem
A single-nucleotide change in the DNA encoding -globin A single-nucleotide change in the DNA encoding -globin
The evolutionary history of the globin gene superfamily The evolutionary history of the globin gene superfamily
Human beta-globin–complex locus control region Human beta-globin–complex locus control region
Making moves Making moves
Video: Hormonal regulation of blood pressure - RAA system

For a complete list of videos, visit our video library