« 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 330 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?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

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

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Pulse oximetry with the sensor probe applied securely, flush with skin, making sure that both sensor Pulse oximetry with the sensor probe applied securely, flush with skin, making sure that both sensor
One-dimensional NMR spectrum of a globin from a marine blood worm One-dimensional NMR spectrum of a globin from a marine blood worm
Model for evidence-based clinical decision making. Model for evidence-based clinical decision making.
A BLAST alignment between human myoglobin and human a-globin showing a 25% sequence identity A BLAST alignment between human myoglobin and human a-globin showing a 25% sequence identity
Allele-specific oligonucleotide (ASO) testing for the -globin gene and sickle-cell anemia Allele-specific oligonucleotide (ASO) testing for the -globin gene and sickle-cell anemia
Mutations in the Beta Globin Gene Mutations in the Beta Globin Gene
Video: DNA Sequences - Dideoxy Sequencing

For a complete list of videos, visit our video library