BIOLOGY HIGH SCHOOL

What do changes in pH (too low or too high) do to an enzyme that reduce its activity? Option 1: Increase its activity Option 2: Have no effect on its activity Option 3: Denature and decrease its activity Option 4: Convert it into a different enzyme

Answers

Answer 1
Answer:

Answer:

3. Denature and decrease its activity

Enzyme activity: pH

Changes in pH can affect the activity of enzymes. Enzymes have an optimal pH which they function most efficiently, and changes from this pH can cause denaturation of the enzyme. An important aspect of molecular biology is that structure means function. Denaturation affects structure of the enzyme and therefore, function. A pH that is too acidic or basic can disrupt the ionic and hydrogen bonds that maintain the 3D structure. This denaturation results in a loss of enzyme activity rather than increase.

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Predict what might happen to this river ecosystem in a boreal forest biome if a dam were built

Answers

if a dam was built it would flood the river. and perhaps could destroy the land. hope this helps. sorry it's not really explained well. 

Please answer asap1)How do conservation tillage practices lead to agricultural sustainability? a. Conservation tillage practices reduce the amount of water required to grow crops. b. Conservation tillage practices help reduce soil erosion and maintain soil nutrient levels. c. Conservation tillage practices naturally protect crops from insect damage, reducing the need for pesticides. d. Conservation tillage practices reduce the amount of energy needed to produce crops.
2)Which best describes the aquifers?
Aquifers 1 and 3 may result in a reduced river flow.
Aquifer 2 may result in reduced surface water levels.
Aquifers 2 and 3 may result in decreased wetland and spring discharge.
Aquifer 3 may result in an increase in productivity.
3)How can recycling materials lead to environmental sustainability?
a.
Recycling materials helps decrease the amount of new materials taken from the environment.
b.
Recycling materials helps increase the rate of carbon sequestration.
c.
By recycling materials, the amount of biomass available for energy purposes is increased.
d.
All of the above

Answers

1. The correct answer is B. Conservation tillage practices help the soil erosion and also maintains soil nutrient levels.

Conservation tillage is termed as the tillage system which helps to conserve energy, soil, water through retention of crop residue and reduction of tillage intensity.

2. Correct answer is A. Aquifers 1 and 3 may result in a reduced river flow. Aquifer is termed as the underground layer of rock fractures, water-bearing permeable rock.

Hydrogeology is termed as study of water flow which is found in aquifers.

3. Correct answer is A. Recycling materials helps decrease the amount of new material which are taken from environment.

Most household can be recycled. Some other examples which are recycled include textiles, plastics, organics, and metals. Metals such as drinking bottles and food cans which are made from steel and aluminium can be recycled.
The answer is given at the attached file. 

Which method describes an example of absolute dating?A.
determining the vertical sequence of rock layers

B.
measuring the radioactive decay of isotopes within rock layers

C.
determining the horizontal sequence of rock layers

D.
identifying index fossil in rock layers

Answers

B) generally scientists will measure the decay of carbon 14 which is a radioactive isotope of carbon with a specific half life (I think 5437 years but I could be way off don't hold me to that number) and that way scientists can tell how old a fossil is
Hope this helped

Which one of the following statements holds true for the induced-fit model?

Answers

There are no true statements on that list.

Eggs are also similar to what other animal

Answers

Answer:

A chicken

Explanation:

Which best differentiates between chemical digestion and mechanical digestion? Chemical digestion happens in the small intestine; mechanical digestion happens in the mouth.

Chemical digestion involves the breaking down of food with enzymes;
mechanical digestion is breaking down food by chewing and tearing with teeth.

Chemical digestion is the breakdown of fats; mechanical digestion is the breakdown of proteins.

Chemical digestion is done only by the major structures of the digestive system; mechanical digestion is done by the accessory structures of the digestive system.

Answers

The answer is Chemical digestion involves the breaking down of food with enzymes; mechanical digestion is breaking down food by chewing and tearing with teeth. 

Mechanical digestion means breaking down food mechanically. By chewing and tearing with teeth, food breaks down into smaller parts and no enzymes are used. Chemical digestion means breaking down food in a chemical manner. This is achieved by secreting enzymes, which break down chemical bond between food molecules.
 The Best answer to the question stated above is "Chemical digestion involves the breaking down of food with enzymes; 
mechanical digestion is breaking down food by chewing and tearing with teeth. "

Mechanical digestion prepares food for chemical digestion.  It involves the chewing and mixing food with saliva, churning of food in the stomach, segmentation of intestines rhythmic local constrictions of intestine, causes mixing improves absorption. On the other hand chemical digestion breaks down complex food molecules into chemical building blocks, enzymes secreted into alimentary canal lumen.
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