Researching the question "Should we dissect?"

Which of the following could be found on either public or private land?

algol [13]

A state park since it’s owned by the state and not anyone else because a single-family residence is private and you can only go there is you live there, a mine is obviously private because you gotta work there, and a factory is also private because it’s owned by a company and not aloud to the public.

5 0

3 years ago

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12 POINTS! Describe the two major types of active Transport in cells. PLEASE HELP.

Mars2501 [29]

1. SIMPLE DIFFUSION

Diffusion is the tendency of molecules to spread from regions of high concentration to regions of low concentration. This movement is due to a concentration gradient. This is the difference in concentration between two different regions. An example - when you spray perfume in the corner of a room and eventually you can smell it everywhere.

2. OSMOSIS

Osmosis is the diffusion of water across a selectively permeable membrane from a region of high water concentration to a region of low water concentration.

7 0

3 years ago

The following is a list of events involved in the activation of a cell by a steroid hormone. Which one of the following answers

ira [324]

Answer:

diffusion of the hormone through a target cell membrane

formation of a hormone-receptor complex

activation of a gene

cellular response to the hormone

production of a protein

Explanation:

Steriod hormone are primary hormones derived from lipids. Such as reproductive hormones i.e the testosterone and the estrogens, which are produced by the gonads (testes and ovaries). Steroid hormones are not soluble in water (they are hydrophobic). For a new cell to be activated by a steriod hormone, there are a lot of steps invovled, Steriod hormones must travel to their target cell bound to a transport protein (i.e diffusion of the hormone through a target cell membrane).

Once the hormone binds to the receptor in the targeted cell, a chain of events is initiated that leads to the target cell’s response (I.e formation of a hormone-receptor complex). Hormones plays a vital role in the regulation of physiological processes because of the target cell responses they regulate.

The message a hormone sends is received by a hormone receptor, (a protein located either inside the cell or within the cell membrane). The receptor will process the message by initiating other signaling events such as (activation of a gene) or cellular mechanisms that result in the target cell’s response. Hormone receptors recognize and respond to them (i.e cellular response to the hormone). Thus, the response triggered by a hormone depends not only on the hormone, but also on the target cell.

Once the target cell receives the hormone signal, it can respond in a variety of ways. The response may include the (production of protein synthesis), activation or deactivation of enzymes, alteration in the permeability of the cell membrane, and stimulation of the secretion of products. etc

5 0

4 years ago

Which group in a food web is responsible for returning inorganic compounds back to the environment?.

kaheart [24]

The answer is Decomposers

4 0

2 years ago

Which of these statements are accurate? Hexokinase is a type of transferase that catalyzes the transfer of a phosphoryl group fr

Agata [3.3K]

Answer:

A. The conformational shift that occurs when glucose, but not water, enters the active site prevents water from hydrolyzing ATP. True

B. Hexokinase consists of two domains, or lobes, that come together when glucose and the MgATP2–MgATP2– complex are bound. True

C. Hexokinase is a type of transferase that catalyzes the transfer of a phosphoryl group from ATP to a hexose. True

Explanation:

A. Hexokinase suffers and conformational changes by binding glucose in a reaction that prevents ATP hydrolysis.

B. Hexokinase is an enzyme with two domains that function by binding to the substrate (i.e., glucose). The region linking both protein domains is responsible for the catalytic activity.

C. Hexokinase is a type of transferase that catalyzes the transfer of a phosphoryl group from ATP to a hexose. During the first stage of glycolysis, the hexokinase transfers one phosphorous group from magnesium-ATP (Mg-ATP) to one hexose molecule, such as fructose, mannose or glucose.

False statements:

- Most kinases require the presence of a monovalent metal ion cofactor to prevent ATP hydrolysis. False: In canonical kinases, conserved amino acids bind to divalent metal ions before the transference of the phosphate group to their substrates.

- Hexokinase is found in the mitochondrial membrane. False: Hexokinase is found in the cytosol.

- Hexokinase transfers the terminal phosphate of ATP to carbon 3 of glucose. False: Hexokinase catalyzes the transfer of the terminal phosphate ATP to form glucose 6-phosphate.

5 0

3 years ago