Unit 6

Question 1

What is the name of pH-indicator

Answer 1

Phenol red

Question 2

What is the color of phenol red in an acidic solution (pH<7)?

Answer 2

Yellow

Question 3

What is the color of phenol red in a neutral to basic solution (pH>7)

Answer 3

Red

Question 4

after testing a leaf for starch it remained green that means ?

Answer 4

There is no starch

Question 5

after testing a leaf for starch it turned black that means ?

Answer 5

there is starch

Question 6

chlorophyll is insoluble in water but soluble in?

Answer 6

methanol or ethanol

Question 7

During respiration,hydrogen atoms are removed from glucose molecules by an enzyme called……….(1)and passed to various chemicals called………..(2)

Answer 7

1. dehydrogenases
2. hydrogen acceptors

Question 8

what is the dye that act up as an artificial hydrogen acceptor?

Answer 8

methylene blue

Question 9

when the methylene blue is reduced by accepting hydrogen atoms it goes ?

Answer 9

colorless

Question 10

Production of CO2 during anaerobic respiration is also called ?

Answer 10

fermentation