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lesantik [10]
3 years ago
13

Pepsin, an enzyme found in the stomach, acts best at a ph of about 2, but it is not active at a ph of 7. why

Biology
1 answer:
ipn [44]3 years ago
3 0
It is only active at a pH of around 2 because that is around the same pH as the gastric juices in the stomach which is where pepsin is used to break down proteins.
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2. A male rabbit with the genotype GGbb is crossed with a female rabbit with the genotype ggBb
bekas [8.4K]

Answer:

- Half (8/16) of the offspring will have gray fur and black eyes.

- Half (8/16) of the offspring will have gray fur and red eyes.

- None (0/16) of the offspring will have white fur.

Explanation:

For the purposes of this question, we will assume the following notation for the involved alleles:

G: gray fur (dominant), g: white fur (recessive).

B: black eyes (dominant), b: red eyes (recessive).

A GGbb rabbit may only produce one type of gametes, namely Gb.

A ggBb rabbit may produce either gB or gb gametes.

Since not all theoretical combinations are present, the resulting Punnett square may be simplified as follows:

       |     Gb

——-+-————

gB   |   GgBb

——-+-————

gb   |   Ggbb

As seen above, 100% of the offspring will have a Gg genotype (resulting in gray fur). As for eye color, half of them will have a Bb genotype (resulting in black eyes) whereas the other half will have a bb genotype (red eyes).

6 0
3 years ago
Why is knowledge of both human anatomy and human physiology necessary?
marshall27 [118]

An understanding of anatomy is key to the practice of health and medicine

6 0
3 years ago
Give me a sentences with those words:(one sentence for each word)
Inessa05 [86]

Answer:

the heat in the classroom made him feel faint so he asked permission to exit

Copper is a good medium for the conduction of heat and electricity

These fires create convection funnels, and throw a lot of particles into the upper atmosphere

The sun, a lamp, or an electric heater all warm us by radiation

Explanation:

hope this helps

3 0
2 years ago
How do the hormones of the pancreas maintain homeostasis?
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Hormones glucagon and insulin are produced in the alpha and beta cells respectively in the Islet of Langerhan in the pancreas. They are involved in the negative feedback system of blood glucose regulation in homeostasis.

GLUCAGON: when there is a low blood glucose concentration, the pancreas detect this and alpha cells produce and release glucagon. Glucagon causes the cells of the body to absorb less glucose from the blood. It also inhibits the process of converting glucose into glycogen (glycogenesis) and cause gluconeogenesis (process of converting amino acids/proteins and lipids/fats into glucose) and glycogenolysis (conversion of glycogen to glucose). Finally, glucagon decreases the rate of respiration so less glucose is required.

INSULIN: when blood glucose is high, insulin is released. Insulin binds with cell surface receptors of cells and activates the enzymes attached to the receptor. The enzymes cause a conformational change in the structural proteins that surround glucose transport protein containing vesicles, causing them to move out of the way so the vesicles migrate up to the cell membrane and glucose transport proteins can fuse with it. Thus, more glucose can be taken in by cells. Insulin also cause glycogenesis (converting glucose into glycogen) and inhibits gluconeogenesis and glycogenolysis.

Basically insulin decreases blood glucose concentration (eg. after eating) and glucagon increases it (eg. skipping breakfast in the morning)
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3 years ago
What are the different Kigdoms
Romashka-Z-Leto [24]

Answer:

The six Kingdoms are: Archaebacteria, Eubacteria, Fungi, Protista, Plants and Animals.

Explanation:

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