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tiny-mole [99]
3 years ago
12

What information must be considered to determine whether a specific molecule will pass through a biological membrane?

Biology
2 answers:
Y_Kistochka [10]3 years ago
4 0
The cell membrane is selectively permeable, meaning that only certain things like small unchanged molecules and ions are able to diffuse across, can pass through the membrane whilst other molecules require a transport protein as seen in passive transport, active transport and facilitated diffusion.
valina [46]3 years ago
3 0

Answer:

Size, polarity, and direction of concentration gradient  

Explanation:

A biological membrane is a semipermeable lipid bilayer.

Size

Only small, nonpolar molecules can move through the lipid bilayer. Oxygen, and carbon dioxide are examples. Even though they are polar, water and ethanol are also small enough to pass through the membrane

Polarity

Smaller lipids (nonpolar) can also pass through the membrane. Polar molecules (like glucose and amino acids) and ions (like Na⁺ and K⁺) cannot pass through without assistance.

Concentration gradient

Small molecules diffuse spontaneously from an area of high concentration to an area of low concentration. Such movement is called passive transport.

Special channels allow polar glucose and amino acids to diffuse through the membrane while avoiding the lipid bilayer. This is facilitated diffusion.

Ions and molecules that must be moved against a concentration gradient must go through special channels using energy from ATP. This is active transport.

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An experiment during which two heterozygous individuals are bred and produce two different phenotypes for a single trait is term
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Answer:

monohybrid cross

Explanation:

An experiment during which two heterozygous F1 individuals are bred and produce two different phenotypes for a single trait is termed a monohybrid cross.

3 0
2 years ago
The model that assumes that evolution proceeds with a slow successive change in a given evolutionary line are referred to
Maru [420]

Answer:

The correct answer is - d.  gradualism.

Explanation:

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Thus, the correct answer is - D. gradualism.

4 0
3 years ago
The climate zones lying between 23.5° and 66.5° north and south latitude are called the _____ zones.
Veronika [31]

Answer:

they are the temperate zones

Explanation:

5 0
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Answer:

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Explanation:

7 0
3 years ago
The scientist who proposed the chromosomal theory of inheritance​
11Alexandr11 [23.1K]

Answer:

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#CarryOnLearning

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