Question

check my answer

Answer 1

Question 1 (Multiple Choice Worth 2 points)

(02.01 MC)

In the human stomach, chemical reactions take place in an acidic environment. Some of these reactions are catalyzed by enzymes. How would these enzymes most likely function in an environment where the pH was doubled?

The rate of the reactions that are catalyzed by the enzymes would double.
The rate of the reactions would increase as the PH is increased.
The enzymes would not be able to function properly outside of their optimal pH range.
The enzymes would interfere with chemical reactions by bonding with the reactants.
Question 2 (Multiple Choice Worth 2 points)

(02.05 LC)

Which of the following is needed for cellular respiration to occur?

Sodium
Oxygen
Water
Nitrogen
Question 3 (Multiple Choice Worth 2 points)

(02.01 MC)

Which of the following correctly describes the image below?

A single hydrogen atom bonded to a central carbon atom. An amino group and a carboxylic acid group both bonded to the central carbon atom. A side chain group, represented by the variable R, is attached to the central carbon atom.

Protein Molecule
RNA Molecule
Amino Acid
Carboxylic Acid
Question 4 (Multiple Choice Worth 2 points)

(02.03 MC)

Which of the following correctly compares the structures of plant and animal cells?

Both plant and animal cells have a large central vacuole where enzymes, nutrients, and waste are stored.
Both plant and animal cells have ribosomes which synthesize proteins for the cell.
Both plant and animal cells have a nucleus where cellular respiration takes place.
Both plant and animal cells have cell walls which transport substances into and out of the cell.
Question 5 (Multiple Choice Worth 2 points)

(02.02 MC) The contracting and relaxing of muscle is regulated by the amount of calcium present in the cells of muscle fibers. These cells must be able to move the calcium ions from areas with low concentrations to areas with high concentrations. What process would be necessary for this movement to occur?

Osmosis
Active Transport
Passive Transport
Facilitated Diffusion

Answer 2

#1
Enzymes need an optimum pH to work, they would not work if either pH is increased or decreased.

Answer 3

1. C
2. B
3. C (i'll send the pic over)
4. B
5. B

Answer 4

sorry lost connection

Answer 5

#2
Cellular respiration is basically oxidation of glucose molecule to release energy. Therefore you know what is needed for oxidation ...

Answer 6

is oxidation oxygen cause i chose oxygen

Answer 7

for question 3

Answer 8

Oxidation means addition of oxygen, so yes oxygen is required

Answer 9

oh okay

Answer 10

#4
Cell wall and large central vacuole is exclusive to plant cells. Both have ribosomes which synthesizes proteins.

Answer 11

To move things fro low concentration to high concentration you need energy and such atransport in which energy is involved is called as Active transport.

Answer 12

yay! how about number 3 did i get that one correct?

Answer 13

#3
That is called an amino acid.

Answer 14

okay yay so happy i got these right i think i got the rest right too but i just wanna be 100% sure

Answer 15

I'll have to go to sleep now...i am too tired..i can barely open my eyes now....i was awake for whole night..lol..

Answer 16

it's fine good night!