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
Deffense [45]
3 years ago
7

Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membr

ane, because is it semi-permeable, allowing small molecules to cross the membrane, but NOT larger molecules, like starch. A starch solution is placed in the dialysis tubing and then the dialysis tubing is placed in an iodine and water solution. Iodine is used as an indicator for the presence of starch. Normally, iodine is a yellow-brown color, but in the presence of starch, it turns a deep purple. After observing the experimental setup for 20 minutes, the iodine solution remains brown, but the starch solution inside the dialysis tubing is purple and swollen. Based on what you learned from the lab, starch is MOST likely to cross the cell membrane at which of the points indicated on the diagram? A) Starch crosses the cell membrane at A. B) Starch crosses the cell membrane at B. C) Starch crosses the cell membrane at D. D) Starch crosses the cell membrane at E.
Biology
2 answers:
zaharov [31]3 years ago
6 0

Answer:

C) Starch requires ATP energy for transport and therefore cannot cross the dialysis tubing into the iodine solution.

Explanation:

I did the USAtestprep

katovenus [111]3 years ago
5 0

Answer:

Starch crosses the cell membrane at E.

Explanation:

i did the USATestprep

You might be interested in
Que son las vorticelas?
Lady_Fox [76]
VORTICLAS ISN'T A WORD
4 0
3 years ago
Elements in group 16 want to bond with elements in group_____
irga5000 [103]

Answer:

oxygen, sulfur, selenium, tellurium, polonium, and ununhexium (O, S, Se, Te, Po, and Uuh, respectively)

Explanation:

i hope it helps all this are 6 valence from electron and form 2-iron.

7 0
2 years ago
What two things must come together to form a seed?
Dmitry [639]

Answer:

Double fertilization involves two sperm cells; one fertilizes the egg cell to form the zygote, while the other fuses with the two polar nuclei that form the endosperm. After fertilization, the fertilized ovule forms the seed while the tissues of the ovary become the fruit.

7 0
2 years ago
Which environmental problem is affecting Tuvalu?
Talja [164]
<span>The environmental problem affecting Tuvalu is (B) Climate Change. Its effects can be seen on the change of sea level. Sea level rise, is one of the consequences that made a major threat for Tuvalu. This consequence brought by climate change has a big impact on the islands.</span>
3 0
3 years ago
Read 2 more answers
Some people only "burn" when exposed to the sun. the reason they don't tan is that
gayaneshka [121]
The reason they don't tan is because their melanocytes are inactive.

Hope this helps<3
8 0
3 years ago
Other questions:
  • What is the danger of digging a hole for an outhouse at a beach cottage?
    12·1 answer
  • The ____________ synthesizes proteins for secretion out of the cell and for utilization in the cell.
    15·1 answer
  • Is gender an inherited or acquired trait?
    9·1 answer
  • In an experiment, what is the factor that is tested?
    14·1 answer
  • Egg and sperm cells
    15·1 answer
  • Why do flowers contain more stamen than pistils
    8·1 answer
  • Pls help with these questions (Its for a project):
    10·1 answer
  • In humans blood type is determined by the A B, and O alleles. The A and B alleles are codominant to each other and dominant over
    15·1 answer
  • Help needed asap please?
    5·1 answer
  • Eukaryotic cells do NOT have a cytoplasm true or false
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!