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3 years ago

What is sex link disorder

2 answers:

8 0

Sex linkage. ... In mammals, the female is homogametic, with two X chromosomes (XX), while the male is the heterogametic sex, with one X and one Y chromosome (XY). Genes on the X or Y chromosome are called sex-linked.

Agata [3.3K]3 years ago

6 0

They are any diseases or abnormal conditions that are caused by a defective gene

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Which of the following is an intrusive igneous body

stepladder [879]

Batholith is the answer

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Which factors effect earths climate?

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The factors were latitude, elevation, nearby water, and ocean curents. All of these factors affect earth's climate.

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3 years ago

"familiarity breeds contempt" is challenged by which concept

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Near exposure is contempt challenged by familiarity breed While the cliché "familiarity breeds contempt" contradicts which of the rules of interpersonal attraction called proximity. The more acquainted one becomes with a person, the more one knows about his or her shortcomings and, hence, the easier it is to dislike that person.

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3 years ago

(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter

Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport. 

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There are three main different types of transport across the membrane

Simple diffusion ⇒ Does not need energy to occur
Facilitated transport ⇒ Does not need energy to occur
Active transport ⇒ Needs energy to occur

Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

The cells maintain a 120 mM intracellular concentration of substance L.

Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

External concentration of substance(mM) Rate of entry of substance L

10 5%

20 25%

30 45%

40 65%

50 80%

60 90%

70 95%

80 100%

90 100%

100 100%

Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.

Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

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3 years ago

Which is a biological effect of the hydrogen bonding between molecules of water?

tatuchka [14]

thecorrect answer is c

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