MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Proteins in Plasma

Human fetal h...

Question

Human fetal haemoglobin differs from the adult haemoglobin in that it has

A

Higher affinity for oxygen.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Lower affinity for oxygen.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Two subunits only.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Is glycosylated.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Higher affinity for oxygen.
Fetal haemoglobin has two alpha and two gamma subunit whereas adult haemoglobin has two alpha and two beta subunits. Fetal haemoglobin has a great affinity for oxygen because of its interaction with 2,3-bisphosphoglycerate and thus, shows oxy-haemoglobin dissociation curve towards left. Thus, the correct answer is option A.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Foetal haemoglobin has X affinity for oxygen than that of mother's haemoglobin during gestation. X is

Q. High pH lowers affinity of oxygen to haemoglobin.

Q. High temperature lowers affinity of oxygen to haemoglobin.

Q. Fetal hemoglobin is the main oxygen transport protein in the human fetus, and it has a higher affinity for oxygen than the adult form of hemoglobin. This phenomenon is illustrated in the curve above:
Both fetal and adult hemoglobin are quaternary proteins composed of four protein subunits. However, adult hemoglobin is composed of two

α

(alpha) and two

β

(beta) subunits, while fetal hemoglobin is composed of two

α

(alpha) subunits and two

γ

(gamma) subunits.
In humans, the gene that codes for the alpha subunit is on chromosome 16, and the genes for both the gamma subunit and the beta subunit are on different loci on chromosome 11. Fetal hemoglobin is replaced by adult hemoglobin by the time a newborn is about six months old. The best explanation for this is that

Q. Haemoglobin has a higher affinity for oxygen than for carbon monoxide.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Body Fluids

BIOLOGY

Watch in App

explore_more_icon

Explore more

Proteins in Plasma

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon