This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following correctly describes the structure of normal hemoglobin A (Hb A)? a. Four ... (Read 34 times)

WWatsford

  • Hero Member
  • *****
  • Posts: 539
    • Biology Forums!
on: Jun 25, 2018
Which of the following correctly describes the structure of normal hemoglobin A (Hb A)?
 
  a. Four identical polypeptide chains, each containing two heme groups
  b. Two a and two b polypeptide chains, each containing one heme group
  c. Conjugated protein with 141 amino acids, containing two atoms of iron
  d. Two d and two g polypeptide chains, each containing a single heme group

Question 2

Which of the following is most responsible for the strength and pliancy of the red cell membrane?
 
  a. Glycophorin A
  b. Spectrin
  c. Cholesterol
  d. Ankyrin


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

johnpizzaz

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
Hb A is composed of two a and two b chains. Each of these chains contains one heme group.

Answer to Question 2

ANS: B
Spectrin composes 50 to 70 of the membrane skeletal mass and is the primary peripheral protein involved in maintaining the skeletal structure of the red cell. By the way it lines up with other spectrin molecules, it also plays an important role in making the red cell membrane deformable (pliant). This flexibility is important for permitting the red cell to squeeze through pores that have a diameter smaller than that of the red cell.


WWatsford

  • Member
  • Posts: 539
Reply 2 on: Jun 25, 2018
Thanks for the timely response, appreciate it

pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Changes in bronchioles during an asthma attack: (A) normal bronchiole and (B) in asthma attack. Changes in bronchioles during an asthma attack: (A) normal bronchiole and (B) in asthma attack.
Part A - Structure of the sarcomere Part A - Structure of the sarcomere
A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain
Normal oxygen sensor frequency is from about one to five times per second. Normal oxygen sensor frequency is from about one to five times per second.
Which is the most acceptable electron dot structure for N2H2? Which is the most acceptable electron dot structure for N2H2?
DNA composition and structure DNA composition and structure
Video: Gastroesophageal Reflux Disease (GERD)

For a complete list of videos, visit our video library