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3 years ago

The movement of matter across a cell membrane against a concentration difference is called

Biology

2 answers:

EleoNora [17]3 years ago

4 0

The movement of matter across a cell membrane against a concentration difference is called an Active Transport.

Sphinxa [80]3 years ago

4 0

Answer:

Active transport.

Explanation:

The molecules can pass through the cell membrane by the process of transport according to the concentration gradient. Two main types of transport are active transport and passive transport.

Active transport requires energy in the form of ATP. The active transport moves the molecule towards the higher concentration from the region of lower concentration. The molecules move against the concentration gradient in the active transport.

Thus, the answer is active transport.

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Which number identifies the trench? A. 4 B. 5 C. 6 D. 7 E. 8 F. 9

ivanzaharov [21]

Im pretty sure its c. I did that a couple of years ago...I think

7 0

3 years ago

Juan has been diagnosed with mono, and the doctor wants to determine if his spleen is enlarged. Where (quadrant, etc.) will the

hichkok12 [17]

Answer and Explanation:

Where (quadrant, etc.) will the doctor palpate Juan's abdomen?

Under normal conditions in general the spleen can not be palped because of its reduced size. But when it is enlarged it might be easily touched. The spleen is located under the thoracic cage (rib cage) on the left side, between the 8th and 11th ribs. This would correspond to the left superior quadrant (left hemi-belly).

What other organs might be compressed by Juan's enlarged spleen?

The enlargement of the spleen and the liver inflammation are symptoms of the mono disease. This enlargement might affect some neighboring organs such as the stomach, which might be displaced and compressed.

why is Juan's spleen enlarged and not his stomach or kidney?

The spleen is part of the immunological system and helps the body to fight infections and filter old bloody cells taking them out of the blood current. This organ might get enlarged because blood cells accumulate in its interior. Red blood cells are excessively stored in the spleen, resulting in anemia. The more cells the spleen retains, the larger it becomes, and hence, the more blood cells it retains and destroys. If the spleen is unproperly working, it kills too many red blood cells and accumulates many others.

The Stomach and kidney are not part of the immunity system and they do not filter blood cells, so they do not seem to be affected by their accumulation.

6 0

3 years ago

In fruit flies, curved wings (w) are recessive to the dominant straight wings (W), and ebony body (b) is recessive to the domina

lara [203]

Answer:

The correct answer =

parents : WwBb x wwbb

offspring :

WwBb, Wwbb, wwBb, and wwbb

Explanation:

It is given that the straight wings (W) is dominant over curved wings (w) and the ebony body (b) is recessive to the dominant gray body (B) and there is a cross between curved wings and ebony body and straight wings and gray body is made. The phenotypic ratio is: 1:1:1:1 for the four different phenotypes straight gray, straight ebony, curved gray, curved ebony.

It is not given the genotype of parents, however, for the curved and ebony fly, it is clear that both alleles are recessive as recessive alleles only appear in absence of the dominant allele of the trait.

For another parent, the possible genotypes can be WWBB or WwBb, however in the case of WWBB the phenotypic ratio would not be equal therefore,

crossing WwBb x wwbb

This can be represented in the form of a punnett square as below:

wb wb wb wb

WB WwBb WwBb WwBb WwBb Straight wing, Gray body

Wb Wwbb Wwbb Wwbb Wwbb Straight wing, Ebony body

wB wwBb wwBb wwBb wwBb Curved wing, Gray body

wb wwbb wwbb wwbb wwbb Curved wing, Ebony Body

The phenotypic ratio is: 1:1:1:1 for the four different phenotypes

4 0

2 years ago

Can someone please help me with this ap biology problem! I would really appreciate it:)

strojnjashka [21]

Answer:

D - the production of a specific mRNA will increase as a result of the binding of the hormone receptor complex to the DNA

Explanation:

We are told that the hormone binds a receptor and then enters the cell, binding to the DNA and promoting transcription of a specific gene.

Transcription is the process whereby mRNA molecules are synthesised from a DNA sequence, which are then translated into specific process. D is correct, as the gene the hormone binds to will increase in transcription, producing a specific mRNA.

A, B and C are much more general processes, not linked to the actions of a hormone on a specific gene.

3 0

3 years ago

ATP and NADH are important energy carriers in the cell.

gulaghasi [49]

Answer:

1. Diffusible through the cytoplasm: BOTH

ATP is a molecule found in the cytoplasm. During the glycolysis process, two molecules of NADH are formed in the cytoplasm and are subsequently transported to the mitochondrial matrix.

2. Can donate hydrogen atoms: NADH

Cytoplasmic nadh transfers hydrogen to oxaloacetate forming malate.

3. Energy stored in bonds between two terminal phosphates: ATP

The bonds between phosphate groups like those of atp are called phosphoanhydride bonds and are used as "high energy" bonds.

4. Contains adenosine ATP

the atp is known as adenosine triphosphate

5. Activates sugars for glycolysis

ATP, by phosphorylating glucose, activates glucose with two phosphate groups (to increase its energy) so that it can be used in other processes when necessary.

6. Two (net) molecules are generated via glycolysis ATP

7. Supplies the electron transport chain nadh

In the electron transport chain each molecule of NADH is converted to 3 of ATP.

8. Hydrolysis can be coupled to biosynthetic reactions

ATP can be hydrolyzed to ADP and Pi by adding water, releasing energy.

9. Can transfer phosphate groups

ATP provides energy by phosphate group transfer

10. Contains nicotinamide ring NADH

5 0

3 years ago

Read 2 more answers