Question

Read the following and answer the four questions from 20 (a) to 20 (d)

Seaweed, or macroalgae, refers to several species of macroscopic, multicellular, marine algae. The term includes

some types of Rhodophyta (red), Phaeophyta (brown) and Chlorophyta (green) macroalgae. Seaweed species such

as kelps provide essential nursery habitat for fisheries and other marine species and thus protect food sources; other

species, such as planktonic algae, play a vital role in capturing carbon, producing up to 90% of Earth's oxygen.

Seaweed is consumed across the world in soups, sushi or onigiri (rice balls). Alginates, agar and carrageenan are

gelatinous seaweed products . Agar is used in foods such as confectionery, meat and poultry products, desserts and

beverages and moulded foods. Carrageenan is used in salad dressings and sauces, dietetic foods, and as a preservative

in meat and fish, dairy items and baked goods. Alginates are used in wound dressings , and dental moulds.

In microbiology, agar is used as a culture medium.



a) Name the algae that help in producing up to 90% of Earth’s oxygen.

i. brown algae

ii. green algae

iii. planktonic algae

iv. red algae

b) Which sea weed product is used in microbiology?

i. agar

ii. alginates

iii. carrageenan

iv.onigiri

c) In which food item carrageenan is used?

i. dietetic foods

ii. salad dressings

iii. sushi

iv. baked goods

d) Choose the wrong statement.

i. Kelps provide nursery habitat for fisheries.

ii. Agar is used in dental moulds.

iii. Seaweeds are used to make onigiri.

iv. Sea weeds are macroscopic, marine algae
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Answer 1

Answer:

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