Q. Which among the following are the most important agents for carbon dioxide fixation?

View solution

Q. Fresh air contains approximately ______ percent carbon dioxide by volume.

View solution

Q. Cellulose is degraded to cellobiose by the enzyme __________________

View solution

Q. The amount of organic material in the forest soil remains approximately the same from year to year.

View solution

Q. In carbon cycle flow of energy is _________________

View solution

Q. Cellobiose is metabolized directly by many microorganisms.

View solution

Q. Cysteine breaks down in presence of cysteine desulfurase to give _________________

View solution

Q. Which of the following processes is performed by Thiobacillus thiooxidans?

View solution

Q. Sulphates are reduced to hydrogen sulphide by _____________________

View solution

Q. The Winogradsky column experiment is done in the dark.

View solution

Q. The reduction of sulphates and sulphites to hydrogen sulphide is done by which group of bacteria?

View solution

Q. Which among the following develop in the upper portion of the Winogradsky column?

View solution

Q. Purple and green sulfur bacteria use ___________________ as the electron donor to reduce carbon dioxide.

View solution

Q. Which among the following is a non-sulfur purple bacteria?

View solution

Q. The moisture contained in clouds and precipitated as snow,hail,rain etc constitutes _________________

View solution

Q. The surface waters are susceptible to contamination with microorganisms from _______________

View solution

Q. Which of the following is subterranean water?

View solution

Q. Wells less than ___________ deep are considered to be shallow.

View solution

Q. Thermus aquaticus, a common bacterial inhabitant generally prevails in temperatures of ____________

View solution

Q. Hydrostatic pressure increases the boiling point of water but does not change the solubility of nutrients.

View solution