मराठी

The bread or idli dough rises because of ______.

Advertisements
Advertisements

प्रश्न

The bread or idli dough rises because of ______.

पर्याय

  • heat

  • grinding

  • growth of yeast cells

  • kneading

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

The bread or idli dough rises because of growth of yeast cells.

Explanation:

The yeast cells grow, which causes the bread or idli dough to rise. Yeast cells secrete specific enzymes. Some enzymes transform the complex sugars found in these foods into simple sugars like glucose. Other enzymes induce glucose to ferment into alcohol and carbon dioxide, resulting in the rising of bread or idli dough.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Microorganisms : Friend and Foe - Exercises [पृष्ठ २९]

APPEARS IN

एनसीईआरटी Science [English] Class 8
पाठ 2 Microorganisms : Friend and Foe
Exercises | Q 2. (e) | पृष्ठ २९

संबंधित प्रश्‍न

How can the oil spills of rivers and oceans be cleaned?


How can the soil polluted by acid rain be made fertile again?


Why is it necessary to ban the use of plastic bags?


______ acid is used in the production of vitamins.


Find an odd one out.


Write a short note.

Bio-fuels


Complete the paragraph by selecting the appropriate option in parentheses.

(energy, microbial, erosion-proof, reused, purification, environmentally friendly)

Nowadays, instead of chemical catalysts, _______ enzymes are used in the chemical industry. These enzymes are active at low temperature, pH and pressure; due to which _______ is saved and _______ instruments are also not necessary. Enzymes carry out specific processes; hence unnecessary by-products are not formed due to which expenses on _______ are minimised. In case of microbial enzymatic reactions elimination and decomposition of waste material is avoided and enzymes can be _______ Hence, such enzymes are _______.


Read the following paragraph and write the answers to the questions asked.

Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges and buildings occurs due to it. Sulphuric acid is a source of energy for some species of bacteria like Acidiphilium spp. and Acidithiobacillus ferrooxidans. Hence, these bacteria can control the soil pollution occurring due to acid rain. Water soluble salts of uranium are present in the wastes produced during electroplating and in effluent released in the environment from the atomic energy plant. Geobacter convert these salts of uranium into insoluble salts and thereby prevent those salts from mixing with groundwater sources.

  1. What causes metal erosion in statues, bridges and buildings?
  2. Sulphuric acid is the source of energy for which bacteria?
  3. What kind of pollution do these bacteria control?
  4. What are the water soluble salts in atomic energy plants and in the process of electroplating?
  5. Which bacteria prevent these salts from mixing with ground water by converting them Into insoluble salts?

Diptheria affects the ______.


Match the following

i. Amoeba a. Autotrophs
ii. Algae b. Gills
iii. Agaricus c. Biocontrol
iv. Bt cotton d. Sporulation

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×