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 99 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
Gracias!

Liddy

  • Member
  • Posts: 342
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

The structure of fruits as adaptations for seed dispersal. The structure of fruits as adaptations for seed dispersal.
Tertiary structure of sperm whale myoglobin Tertiary structure of sperm whale myoglobin
Structure of the skin. Structure of the skin.
Two classical models for the cooperative ligand binding by hemoglobin Two classical models for the cooperative ligand binding by hemoglobin
Structure of Al2Cl6 Structure of Al2Cl6
Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine
Video: Skin Cancer

For a complete list of videos, visit our video library