All categories

3 years ago

The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of

Biology

1 answer:

ioda3 years ago

4 0

Answer:

Facilitated Diffusion

Explanation:

Some molecules can move down their concentration gradients by crossing to the lipid portion of the membrane directly,while others must pass through membrane protein s in a process called Facilitated Diffusion

You might be interested in

Question 12 (5 points)

nikitadnepr [17]

Answer:

Biodiversity is a major factor in terrestrial regions. true

Cold, hot, wet and dry are factors that contribute to climate

false

Cloud cover, precipitation and deserts are elements that contribute to weather

True

Trade winds blow easterly and northern

True

4 0

3 years ago

Most connective tissue, including bone, is highly vascular. which anatomical structures in mrs. morgan's compact bone house bloo

zhuklara [117]

The haversian canal and volkmanns canals both house blood vessels. The fact that she is bleeding so profusely means she has a hemorrhage and a hemorrhage is the loss of blood through the blood vessels through a ruptured wall. This sign is related because one of these canals was ruptured when her bone was fractured and forced out of the skin.

7 0

4 years ago

Read 2 more answers

What's something you liked or found interesting about any one of the episodes of the aquarium? (Make sure to write at least 4 se

Ghella [55]

Answer:

An interesting episode of the aquarium I had was seeing a dolphin show. The dolphin was super smart, and I have to admit it was smarter than me. I mean I was like 3 when I went there so, I guess that is normal? Anyways, the dolphin was doing cool tricks like twist jumping, and even I tried it but failed. The dolphin went to the worker when the worker called its name. I learned that day that you shouldn't underestimate dolphins because they are smart.

Explanation:

This is an example, so do not copy. You may get inspired.

1 sentence:introduction(aka what you liked or found interesting stuff about the aquarium)

2-4 sentence:the main area(talking about what happened)

1 sentence:conclusion

6 0

3 years ago

Which test tube in the experiment best represents a normal stomach?

zvonat [6]

B) Protein + pepsin

7 0

3 years ago

Where do you cut on a DNA strand to get the insulin out

faltersainse [42]

1.Treat 25 mg of tissue with Proteinase K by adding 20 ml of stock PK solution (20 mg/ml) and 180 ul water. Function: proteinase destroys protein.
2.Let sit at 55 degrees for at least 1 hour. Function: This temperature is optimal for enzyme reaction; if too high will degrade DNAase.
3.Add 1/10 volume of Kac (potassium acetate) (5 M; pH 5.6) (in this example, 20 ul but remember the 1/10 proportion as a general rule). . Mix well and place on ice for 10 minutes. Function: precipitates membrane, C, H, O, lipids, proteins, and monomers.
4.Add 200 ml of phenol saturated with 10mM Tris. ( IN HOOD) Function: removes nonpolar proteins, lipid residue.
5.Cap tube: mix well by inverting tube.
6.Spin 5 minutes in microfuge.
Function: separates aqueous (top) and phenol (bottom) layers 7.Remove upper aqueous layer (CONTAINS DNA) to a new tube.
8.Add 200 ul of chloroform to aqueous layer (IN HOOD). Function: removes excess phenol from DNA.
9.Cap tub; mix well by inverting. Function: sets an emulsion; biphasic solution.
10.Remove upper aqueous layer (CONTAINS DNA) to a new tube.
11.Add 500 ul of EtOH and cap tube (again, 500 in this example; as a proportion use twice the total amount). Function: precipitates DNA; DNA is insoluble in ethanol.
12.Cap tube; mix well by inverting tube several times.
13.Spin for 5 minutes in microfuge. 13000 rpm. (10 min. at 6000.) Function: collects DNA in bottom of the tube.

6 0

3 years ago