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Basile [38]
4 years ago
14

Permeability is the condition of being capable of having materials flow into and out of a membrane. The permeability of a cell m

embrane is determined by how easily a molecule can diffuse across the membrane. Usually, only molecules that are fat-soluble can permeate across a cell membrane. Why is this the case?
Biology
2 answers:
Hoochie [10]4 years ago
6 0
The cell membrane is composed of something called a lipid bi-layer (a double layer of a molecule called a lipid).

A lipid is a type of fat; therefore, if a molecule is fat-soluble, the lipids of the lipid bi-layer of the cell membrane will allow it to pass through.
hammer [34]4 years ago
6 0

Cell membranes are composed of a lipid bilayer.

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gtnhenbr [62]

Your answer is

A. Renewable with a large carbon footprint

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7 0
3 years ago
Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA leve
BigorU [14]

Answer:

a) interphase(G2)

Explanation:

<em>The nucleus would contain 6 pg of DNA at the interphase (G2) phase of the cell cycle.</em>

The cell cycle is characterized by tow main phases, namely;

  • The interphase
  • The m phase

The interphase is divided into G0, G1, S, and G2 phase respectively while the m phase is divided into prophase, metaphase, anaphase and telophase respectively.

At the S phase of the interphase specifically, DNA is replicated and the amount of DNA in the cell becomes double.

<u>Hence, a cell whose DNA amount ranges from 3 - 6 pg will have exactly 6 pg after the S phase of the interphase, which is G2 phase.</u>

The correct option id a.

5 0
3 years ago
How many ATP, NADH, and FADH2 are produced and each step of cellular respiration?
pashok25 [27]

Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate.The net energy gain from one cycle is 3 NADH, 1 FADH2, Page 4 Cellular respiration 4 and 1 GTP; the GTP may subsequently be used to produce ATP. Thus, the total energy yield from one whole glucose molecule (2 pyruvate molecules) is 6 NADH, 2 FADH2, and 2 ATP.

 

Cellular respiration

8 0
3 years ago
Calculate the approximate diameter of the field of view occupied by the flea. The diameter field of view at 100x magnification o
GalinKa [24]

Answer:

The correct answer is "190 um".

Explanation:

The given values are:

Field of view,

= 380 um

Percentage,

= 50%

Now,

The size of flea occupied will be:

= 50 \ percent\times  380

= 0.50\times 380

= 190 \ um

5 0
3 years ago
Why are cells relatively small?
Darya [45]

Cells are so small so the surface area and volume of them can be proportional to each other. This helps with the efficiency of the cell's absorption and waste expulsion processes. Also by the cell's smallness, communication from the nucleus to other organelles is fast and the cell can be regulated while the conditions for diffusion are still ideal.Its because they need to be able to diffuse through materials easily. Also, materials inside and outside of the cell need to easily pass through the cell membrane, which makes it harder and slower for the materials to pass through the cell membrane.

8 0
3 years ago
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