Which means of particle transport requires input of energy from the cell?A) Diffusion
B) Osmosis
C) Facilitated diffusion
D) Active transport

Answers

Answer 1

Answer: D) Active transport. In this process, dissolved molecules move across plasma membrane from a lower to higher concentration. Because they move against the concentration gradient, an energy from the cell is required.

Answer 2

Answer:

Answer:

Explanation:

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Cells require glucose as a source of energy to carry out life processes. Large molecules like glucose cross the cell's plasma membrane byA)
being pumped through ion channels.
B)
active transport through protein channels.
C)
passive diffusion through the lipid bilayer.
D)
facilitated diffusion through protein channels.

Answers

Answer – D. Facilitated diffusion through protein channels
Glucose molecules are too big to pass through the plasma membrane by direct diffusion, so Glucose gains entrance into a cell by facilitated diffusion through protein channels in the plasma membrane. Since glucose moves with the concentration gradient, the built-in protein channels are only there to facilitate the movement of glucose into the cell and no energy is expended.

proteins are used to help move molecules more quickly. It is a process called facilitated diffusion. It could be as simple as bringing in a glucose molecule. Since the cell membrane will not allow glucose to cross by diffusion, helpers are needed. so the the correct chioice is D

Each antibody has at least ______ binding sites that bind to a small portion of the antigen called the ________.

Answers

Im pretty sure its Two, epitope

When cleaning cutting boards, dishes, utensils, and countertops, you should use _____.rubbing alcohol

bleach

tap water

hot soapy water

Answers

when cleaning cutting biards, dishes, untensild, and countertops you shouold use hot soapy water

use rubbing alcohol and mix with water in a spray bottle

Which macromolecule forms a double layer as the primary structure of cell membranes?fatsoilsphospholipidssteroids

Answers

The correct answer is:

phospholipids

Phospholipids - they are made up of hydrophobic tails (inside the double layer) and hydrophilic heads (on the outside of the membrane).

Explanation:

Cell membranes comprise lipids (phospholipids and cholesterol), proteins and carbohydrates assemblies that are connected to some of the lipids and proteins.

Phospholipids are composed of a polar head and non-polar (hydrophobic) tail. They line up such that the heads and the tail groups are side by side to form a single layer due to the information between the head groups and the tail groups. Two of these layers line up with the hydrophobic tail groups facing each other to prevent the hydrophobic groups away from the polar cover collections of other phospholipids and from the water in the adjoining environment.

Phospholipids - they are made up of hydrophobic tails (inside the double layer) and hydrophilic heads (on the outside of the membrane)

Mitochondria and chloroplasts reproduce the same way free-living bacteria do—by

Answers

Using binary fission

What would happen if there were no enzymes in the human body? Explain your answer.

Answers

Enzymes are in our bodies to speed up reactions etc. If there were no enzymes, then our bodies would act very slowly to reactions.

Final answer:

Without enzymes, the body couldn't perform essential chemical reactions quickly enough to sustain life. Enzymes also aid digestion and help in immune defence. Their absence would critically interrupt bodily functions and overall health.

Explanation:

If there were no enzymes in the human body, many essential biological processes would be negatively impacted. Enzymes act as biological catalysts, speeding up the chemical reactions that occur within cells, thereby allowing life-sustaining processes to occur at the rate necessary for life. If we didn't have enzymes, these reactions would happen too slowly to sustain life, or might not happen at all.

Enzymes are vital in breaking down food and converting it into usable energy. Without enzymes, our digestive system would not be able to efficiently break down nutrients, leading to malnutrition and energy deficiency. Moreover, enzymes are involved in the immune system's defence mechanisms. They assist in the destruction of foreign pathogens, thus protecting the body from infections.

Furthermore, each cell's enzyme demand changes according to its needs and role within the body. For instance, the enzymes necessary in stomach cells differ from those in skin, blood, or nerve cells reflecting the diverse functions enzymes perform in the human body.

Overall, without enzymes, the human body would be unable to function properly. They are essential for our survival, and their absence would dramatically alter the way our bodily systems operate.