Lab Exercis 6

Question 1

What molecules move furthest up chromatography strip?

Answer 1

Pigments with fewer polar groups are more soluble in the non-polar solvent, and less attracted to polar paper, so they migrate farther.

Question 2

What is the structure of chloroplast?

Answer 2

Photosynthetic pigments are embedded in the thylakoid membranes, organized into grana. The fluid surrounding the grana is the stroma.

Question 3

What makes up the lead structure?

Answer 3

Epidermis, palisade, spongy mesophyll, and xylem and phloem, and guard cells.

Question 4

What is the cell in the epidermis that contains chloroplasts?

Answer 4

Guard cells.

Question 5

What is the function of guard cells?

Answer 5

Surround the strona and regulate opening and closing if stromata, to facilitate exchange of gases.

Question 6

Where does the majority of photosynthesis occur in cell layers?

Answer 6

Palisade mesophyll and spongy mesophyll.

Question 7

What it the function of xylem?

Answer 7

Transport water from roots to plant.

Question 8

What is the function of phloem?

Answer 8

Transport food and nutrients from leaves to rest of plant.

Question 9

What colour pigment leaves the leaf when placed in heat?

Answer 9

Red pigment.

Question 10

What pigment is extracted in alcohol?

Answer 10

Green.

Question 11

What is the pigment solubilty?

Answer 11

Soluble in alcohol.

Question 12

What compound reacts with iodine? What colour results in a positive reaction?

Answer 12

Starch. A deep blue black colour.

Question 13

What organelle stores starch?

Answer 13

Amyloplast.

Question 14

Why doesnt one of the leaves react with iodine?

Answer 14

The plant isnt photosynthesizing therefore it is not producing glucose or starch.

Question 15

What is chromatography?

Answer 15

Separates the pigments in a mixture in the basis of their polarities.

Question 16

What does alcohol fermentation produce?

Answer 16

CO2 and ethanol.

Question 17

What fermentation do humans perform?

Answer 17

Lactic acid fermentation.

Question 18

What colour does methylene blue turn when it is reduced?

Answer 18

Dyd goes from blue to colourless. During cellular respiration l, electrons are shed and the dye accepts electrons to become colourless.

Question 19

Do germinating seeds produce heat?

Answer 19

Yes because they perform CR which releases heat.

Question 20

What does pulse oximeter detect?

Answer 20

Detects a persons oxygen saturation level, which is the percent of hemoglobin in arterial RBC’s that carry oxygen.

Question 21

Where do all stages of cellular respiration occur in the mitochondrian?

Answer 21

Glycolysis in cytosol.
Calvin cycle occurs in the mitochondrial matrix.
ETC in the inner mitochondrial membrane.