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25 Jan 2019

When you added hydrogen peroxide to potato pieces, you observed bubbling. Which of the following statements about this reaction is FALSE?

1. Hydrogen peroxide is broken down to water and oxygen.

2. Potatoes contain the enzyme catalase.

3. Catalase breaks down to oxygen, producing bubbles.

4. The higher the activity of catalase, the more bubbles will be observed.

5. Hydrogen peroxide contains 2 hydrogen and 2 oxygen atoms.

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Irving HeathcoteLv2

27 Jan 2019

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General Biology Potato (catalase) reaction with hydrogen peroxide - Post Lab Questions: (there was not a prelab or decent explanation prior to the lab or given)

1. Added pototo to hydrogen peroxide and watched react until reaction stopped. If same piece of potato was put in new container of hydroge peroxide would the same reaction occur.

- I'm thinking yes because the enzymes in the potato will break down the new vial of hydrogen peroxide into oxygen and water.

2. Added potator to hydrogen peroxide and watched reaction until reaction stopped. If added to piece of potato to same container of hydrogen peroxide would the same reaction occur.

- I'm thinking no because all the hydengen peroxide was already turned into water and oxygen.

3. If you added detergent to the normal reaction would the rate of the reaction go up or down?

- I'm thinking the reaction rate go up because you are adding another enzyme that will speed up the reaction even more

4. Why does adding hydroxylamine decrease the rate of the reaction?

- I'm thinking the rate is decreased because hydroxylamine is an inhibitor to catalase and inhibits the function of the enzyme to increase reaction rate and it can not lower the activation energy

Part 1

The enzyme responsible for the synthesis of ATP is

Multiple choice

ATP-ase.

cytochrome C.

NADPH.

ATP synthase.

Part 2

The terminal electron acceptor in the electron transport chain is water.

True/Fale

Part 3

Alex, Kim, and Jenna have different levels of activity, and thus require a varied amount of calories per day. Alex is an athlete, and he requires 3500 calories per day to fuel his high intensity activity. Jenna is a secretary and is sedentary most of her day. Her low level of activity requires a mere 1800 calories a day, while Kim, a professional dancer, needs 2800 calories per day to fuel her moderate level of activity.

	Jenna	Kim	Alex
Profession	Secretary	Professional Dancer	Athlete
Level of Activity	Low	Moderate	High
Caloric Needs	1800 Calories/Day	2800 Calories/Day	3500 Calories/Day

Fats are broken down in cellular respiration to generate the ATP needed to fuel our bodies. According to the Food and Drug Administration (FDA), the Percent Recommended Daily value for fats in a balanced diet should not exceed more than 30% of the total daily calorie intake. Fats provide 9 calories per gram.

Nutritional needs of Jenna

What question would this calculation answer?
Finding 30% of 1800 calories and then dividing by 9 calories per gram.
1800 calories x 0.30 = 440 calories
440 calories/9 calories per gram = 49 grams

Multiple Choice

How many grams of fat can Jenna consume in one meal?

How many fat calories can Jenna consume each day?

How many calories are found in 9 grams of fat?

How many grams of fat can Jenna consume each day?

Part 4

Proton pumps are protein complexes that

Multiple Choice

synthesize water from hydrogen and oxygen.

break down water into hydrogen and oxygen.

move hydrogen ions across cell membranes.

move electrons through the cell membrane.

Part 5

As protons move through the proton pump,

Multiple Choice

the membrane becomes more permeable to the hydrogen ions.

the concentration of hydrogen ions inside and outside the cell reaches equilibrium.

they build up on one side of the membrane, producing a concentration gradient.

conformational changes occur within the membrane proteins.

Part 6

The transfer of hydrogen ions across the membrane generates a potential energy gradient.

True/False

Question 1

Light microscopes

	A.	typically provide more resolution than an electron microscope
	B.	work by reflecting electrons off the surface of an object being studied
	C.	use light and glass lenses to magnify an image

Question 2

In the plasma membrane, the phospholipid heads

	A.	are hydrophilic and face outward toward the aqueous solution on both sides of the membrane
	B.	are hydrophobic and face outward toward the aqueous solution on both sides of the membrane
	C.	are hydrophobic and face inward, shielded from water

Question 3

The nucleus of a cell

	A.	is surrounded by a single layer of membrane.
	B.	contains DNA
	C.	is the primary location of protein synthesis

Question 4

Which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

A.		endoplasmic reticulum
B		plasma membrane
C.		Cytoplasm

Question 5

The main function of the rough endoplasmic reticulum is the production of

A.		membrane and proteins secreted by the cell
B.		mitochondria and proteins secreted by the cell
C.		hydrogen peroxide

Question 6

The Golgi apparatus

A.		is the site of glucose breakdown
B.		stores, modifies, and packages proteins
C.		strings together amino acids to produce proteins

Question 7

The function of mitochondria is

		A. cellular respiration
		B. photosynthesis
		C. lipid synthesis

Question 8

Which of the following statements about the cytoskeleton is false?

		A. The cytoskeleton helps to support cell
		B. Once laid down, the elements of the cytoskeleton are fixed and remain permanently in place
	C.	The cytoskeleton is composed of three types of fibers: microfilaments, microtubules, and intermediate filaments