Given below are two statements:

Statement I: Open continuous cultures involve the removal of equal volumes of cells and used medium which is replaced by fresh medium.

Statement II: In closed continuous cultures, the cell population remains static (constant) because cells are constantly removed.

In the light of the above statements, choose the most appropriate answer from the options given below:

#Question id: 10343

#Botany

In many plants, nitrate is assimilated in the root as well as in the shoot according to their native place. Some of the given statements about nitrate assimilation;

a) If plants native to temperate region assimilate NO3^- at root

b) If plants native to temperate region assimilate NO3^- at shoot

c) Plants native to tropical or subtropical region assimilate NO3^- at root

d) Plants native to tropical or subtropical region assimilate NO3^- at shoot

Which of the following combination from above statements is correct?

#Question id: 10346

#Botany

Nitrite reductase will convert nitrite to ammonium. There are two types of nitrite reductase characteristics given below;

a) Both nitrite reductase consist of a single 63kD polypeptide

b) In leaf chloroplasts and root plastids contain different forms of the nitrite reductase enzyme

c) In shoot nitrite reductase directly dependent on the light reaction by the ferredoxin, it activates nitrite reductase in choloroplast

d) NADPH in the roots is provided by pentose phosphate pathway, it also activate nitrite reductase in the plastids

Which of the correct statement about nitrite reductase characteristics?

#Question id: 10358

#Botany

Which of the following essential micronutrients is associated with nitrate reductase enzyme found in higher plants?

#Question id: 10360

#Botany

How much ATP require in the nitrogen fixation or conversion of ammonium assimilation in the system?

#Question id: 10362

#Botany

Bacteria can convert atmospheric nitrogen into ammonia, Several form symbiotic associations with higher plants is given below;

               HOST PLANT                                                                          N-FIXING SYMBIONTS

A) Gunnera                                                                            i) Frankia

      B) Azolla                                                                                ii) Acetobacter

C) Leguminous                                                                     iii) Azospirillum

             D) Actinorhizal                                                                      iv) Nostoc

             E) Sugarcane                                                                         v) Anabaena

             F) Miscanthus                                                                       vi) Sinorhizobium

Which of the following combination with the host plants and n-fixing symbionts is CORRECT?

#Question id: 10363

#Botany

Free living nitrogen fixing takes place as shown in the following;

             TYPE                                                                                       N-FIXING GENERA

A) Cyanobacteria (blue-green algae)                                        i) Bacillus

B) Aerobic                                                                                     ii) Clostridium

C) Facultative                                                                              iii) Anabaena

D) Anaerobic nonphotosynthetic                                            iv) Rhodospirillum

E) Anaerobic photosynthetic                                                     v) Azospirillum

 Which of the following combination of free living nitrogen fixing bacteria is correct?