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 88 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
YES! Correct, THANKS for helping me on my review

ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

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.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Eukaryotic structure Eukaryotic structure
Structure of hair Structure of hair
Plant cell structure Plant cell structure
The structure of collagen fibers The structure of collagen fibers
Polyamines for cell proliferation because of their roles in stabilizing duplex DNA structure Polyamines for cell proliferation because of their roles in stabilizing duplex DNA structure
Antibody structure. Antibody structure.
Video: Photosynthesis overview Animation

For a complete list of videos, visit our video library