1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Neko [114]
2 years ago
6

In this week's experiments, if you replaced glucose with the monosaccharide fructose, predict the results for fructose transport

under all 4 conditions. Explain your prediction.
Biology
1 answer:
lbvjy [14]2 years ago
6 0

Answer: Fructose is transported by facilitated diffusion.

Explanation:

Glucose is a monosaccharide with the molecular formula C6H12O6.3 It is a hexose. It is a form of sugar that is found freely in fruits and in honey. Its energy yield is 3.75 Kcal/g under standard conditions.

Fructose is a type of carbohydrate found in vegetables, fruits, and honey. It is a monosaccharide with the same molecular formula as glucose, C6H12O6, but with a different structure, that is, it is an isomer of glucose. Its energetic power is the same as that of glucose, 4 kilocalories per gram, and it is a reducing carbohydrate.

Glucose is the main energy substance of a cell and for its entry  it requires a transport protein in the cell membrane, called transporter. The transport of glucose through the cell membrane is carried out by two families of membrane proteins:

  • Sodium-coupled glucose transporters (SGLT sodium-glucose-transporters), which involves the co-transport of Na+ by the SGLT-1 by maintaining the Na+ gradient thanks to the Na+/K+ pump
  • Glucose transport facilitation proteins (GLUT)

On the other hand,  fructose is absorbed by another type of transporter, called Glut-5, a protein that crosses the membrane 12 times. Finally, the passage of both glucose and fructose into the blood takes place through the Glut-2, a transporter with low affinity and high transport capacity.

If any Glut is considered within the context of a large family of proteins, it can be immediately noticed that they all possess common characteristics that in biochemical terms are called "molecular signature of glucose transporters" and that it is no more than a set of extremely conserved primary amino acidic sequences that determine secondary and tertiary structures (domains or motifs) that are responsible for the functional characteristics of the protein.

<u>Facilitated diffusion is a type of cellular transport where the presence of a carrier or transporter (integral protein, Glut is this example</u>)<u> is necessary for substances to cross the membrane.</u> It happens because the molecules are larger or insoluble in lipids and need to be transported with the help of membrane proteins. So, in the first step, fructose binds to the transport protein, and this changes shape, allowing the passage of this sugar. In this way, fructose concentrations inside the cell are always very low, and the external and internal concentration gradient favours diffusion.

Summarizing, fructose is transported by facilitated diffusion. So if we replaced glucose with fructose we would have seen no change in each conditions. And since fructose is transported by this type of mechanism, there is not a concentration gradient.

You might be interested in
Where does photolysis of water occur in photosynthesis
iris [78.8K]

Answer:

Photolysis of water takes place in inner membrane of thylakoid.

Hope it helps u.

4 0
2 years ago
Read 2 more answers
Explain the process in which hormones secreted by the pancreas function with respect to increased glucose levels in the blood
KiRa [710]

Answer:

Gastrin: This hormone aids digestion by stimulating certain cells in the stomach to produce acid. Glucagon: Glucagon helps insulin maintain normal blood glucose by working in the opposite way of insulin. It stimulates your cells to release glucose, and this raises your blood glucose levels.

Explanation:

6 0
3 years ago
A species of snake that is found on only one small island is defined as
densk [106]
Barbados threadsnake
8 0
2 years ago
Read 2 more answers
What two factors determine the shape of a protein
liubo4ka [24]
Determined by its primary structure (sequence of amino acids.)

the sequence of amino acids in an protein is determined by the nucleotides in the DNA encoding it
8 0
3 years ago
Read 2 more answers
Describe the changes in the wolf population:<br>a) From 1965 to 1970<br>b) From 1970 to 1975​
Nana76 [90]

Answer:

Explanation:

1965-70 there population dropped majorly and from 1970-75 the wolf population sprung back up

5 0
3 years ago
Read 2 more answers
Other questions:
  • Two reasons why it is easy to harvest perlemoen
    10·1 answer
  • You could find ______ in sewage treatment plants.
    8·1 answer
  • What does monohybrid mean
    8·2 answers
  • What are Earth's ten biomes? A) tundra, taiga, grasslands, deciduous forest, chaparral, desert, desert-scrub, savanna, rainfores
    9·2 answers
  • How do the functions of the glycoproteins on the virus and the flagella on the bacteria differ?
    14·1 answer
  • Why do complex organisms need specialized cells?
    5·1 answer
  • What are the dominant freshwater flora and fauna?
    5·1 answer
  • What is probability and what is it’s role in scientific conclusion
    8·1 answer
  • Which of these statements about ocean waves is true?
    11·1 answer
  • Much of the coordination of vertebrate body functions via chemical signals is accomplished by the ________.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!