Question

If poorly drained soils encourage the growth of bacteria that convert nitrate to nitrogen, the effect on higher plants will be to:_______(A) increase lipid production(B) decrease protein production(C) increase carbohydrate production(D) produce unusually large fruits(E) stimulate chlorophyll production

Answer 1

Answer:(B) decrease protein production

Explanation: nitrogen gas in the atmosphere is the source of nitrogen which is useful to plants.

In the nitrogen cycle, nitrogen gas is converted to it's compounds and then back to it's gas form.

The nitrogenous cycle involves fixation, mineralization, nitrification and denitrification .

In the first three states, nitrogen undergoes changes into a state where it can be absorbed by plants.

In denitrification,nitrates (useful form of nitrogen) are converted into gaseous nitrogen.organisms involved in this process are called denitrifying bacteria eg Pseudomonads sp.

Nitrogen is an important element.

It is useful for the production of protein, DNA, RNA and chlorophyll.

When it is deficient in the soil,it affects the synthesis of proteins and yellowing of leaves due to decrease in chlorophyll

Answer 2

Answer:

(B) decrease protein production

Explanation:

Plants need nitrogen for their growth and development. This is because in addition to needing nitrogen for the production of nucleic acids, the plant needs nitrogen for the production of proteins that will be fundamental in all the functions of the plant's metabolism. However, plants cannot absorb nitrogen and nitrogen-fixing bacteria need to convert nitrogen into assimilable NH4 form. Before, nitrogen is converted into nitrite and nitrate, but plants only absorb NH4. For this reason, if the bacteria convert nitrate to nitrogen, the conversion process to NH4 would be interrupted and the production of proteins in plants would decrease due to nitrogen deficiency.