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
frozen [14]
2 years ago
15

A defective Na+/K+ ATPase pump is isolated from a plasma membrane and studied. Careful measurements in the laboratory determine

that the pump is able to hydrolyze ATP and transports 3 Na+ ions across the plasma membrane. The pump is also able to bind 2 K+ ions with high affinity. However, the pump is unable to shuttle K+ ions across the plasma membrane. Based on these observations, what is the most likely cause of the defect in this pump?
Biology
1 answer:
Paul [167]2 years ago
8 0

Answer:

The defective Na+/K+ ATPase is not able to dephosphorylate itself.

Explanation:

Na+/K+ ATPase pump cycles between two different forms: the phosphorylated form of the Na+/K+ ATPase has a high affinity for K+ ions and low affinity for Na+ ions. The release of phosphate from ATP and phosphorylation of Na+/K+ ATPase makes the pump to release the bound 3 Na+ ions outside the cell and to bind to the 2 K+ ions from the surroundings. As the Na+/K+ ATPase is dephosphorylated, its affinity for K+ ions is reduced leading to the release of K+ inside the cell.  

A defective Na+/K+ ATPase that is able to pick and bind the K+ ions but is not able to shuttle them across the membrane should be defective to achieve its dephosphorylated form. Without releasing phosphate, the affinity of the pump for K+ ions is not reduced and the pump would not be able to release them to the opposite side of the membrane.  

You might be interested in
How are trace fossils unique
Pavlova-9 [17]

Answer: they showed the body of an organism not the activities

Explanation:

8 0
2 years ago
BEST ANSWER GETS BRAINLIEST FOLLOW FIVESTAR AND THANK YOU
FinnZ [79.3K]

Answer:

By researching, I would think that the answer is D. Ice crystals melt as they fall through a warm layer of air and then refreeze into small ice pellets as they pass through a colder layer of air.

Explanation:

<em>During precipitation formation, if temperatures are at or below freezing, 0°C (32°F), at cloud level, water in the air freezes into ice crystals, and the crystals stick together to make snow. The snow starts to fall, and if the air column is freezing cold all the way down from the clouds to the ground, the precipitation stays frozen. It simply falls as snow.</em>

<em />

<em>Sometimes, however, a temperature inversion occurs. Normally, the temperature decreases with increasing altitude. A temperature inversion is when a layer of warm air intrudes between the ground and the clouds.</em>

<em />

<em>Under these conditions, when the falling snow reaches the layer of warm air, it melts. Then it hits the layer of cold air just above Earth’s surface and refreezes. This all happens very fast, and the result is tiny ice pellets called sleet.</em>

7 0
2 years ago
2. Members of this kingdom secrete enzymes into their food then absorb the digested matter
Fudgin [204]

Answer:

Fungi

Explanation:

Fungi are an example of saprotrophs i.e. organisms who live and feed on dead organic matter. Saprotrophic nutrition is described as chemoheterotrophic extracellular digestion. It involves the extracellular release of digestive enzymes on the organic matter. The enzymes break down the organic matter into a simpler form, which is then absorbed by the fungus.

4 0
2 years ago
One standard drink contains about _______ of absolute alcohol.
NNADVOKAT [17]

The answer is B. 0.5 ounce

A standard drink should have around 14gram or 0.5 ounce or alcohol content. The volume of alcohol would be vary in different drinks because of the different alcohol concentration. Standard drink on different beverage would be 12 ounches of beer, 5 ouches of wine or 1.5 ounches of spirits.

6 0
3 years ago
what does it mean to have a high pH (which numbers), low pH? which is acidic? Which is basic? which has more H ions? which has l
Reptile [31]
0-7 is acidic then 7-14 is not acidic 7 is neutral H ions contains more the acids then bases have less H ions
A high Ph means it’s not acidic if it’s over 7
5 0
3 years ago
Other questions:
  • Plz need to answer a b c d
    12·2 answers
  • How do the nucleotides in DNA pair ?????
    13·2 answers
  • Which of the following is the simplest unit of a nucleic acid
    10·2 answers
  • What biome would contain the most trees
    5·1 answer
  • Why does a cracker taste different after being soaked in saliva for 2 minutes?
    7·2 answers
  • Explain what it means to say that natural selection is not random
    10·1 answer
  • Which principle states that during hamate formation genes for different traits separate whiteout influencing each other’s inheri
    8·1 answer
  • Rna contains the nitrogenous base ______ instead of ______, which is only found in dna.
    13·1 answer
  • Viruses have many things in common with living organisms, but they are NOT actually considered living. Why?
    7·1 answer
  • Stage of development for animals​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!