Bacteriophage λ, has two mode of life cycle;  lytic and lysogenic.  In the lytic growth

a) a single Cro dimer is bound to OR3; this site overlaps PRM and so Cro represses that promoter

b) Repressor bound at OR1 and OR2 blocks RNA polymerase binding at PR, repressing transcription from that promoter

c) PR and PL binds RNA polymerase and directs transcription of lytic genes

d) During lytic, PRM is on while PR (and PL) are off

Find the correct combinations of lytic growth.

#Question id: 10177

#Unit 6. System Physiology – Plant

Shady habitats proportionally more abundant far-red light, which is absorbed primarily by photosystem I (PSI) at P700nm, for better balance the flow of energy through PSII and PSI so, what will be the changes appear to enhance light absorption and energy transfer in shady environments?

a.) some shade plants is to produce a higher ratio of PSII to PSI reaction centers, compared with that found in sun plants

b.) photosystem I (PSI) for enhancing light absorption and energy transfer in shady plants increases their reduction potential

c.) some shade plants add more antenna chlorophyll to PSII to increase absorption by this photosystem

d.) photosystem I (PSI) for enhancing light absorption and energy transfer in shady plants decreases their reduction potential

Which of the following above combination is TRUE?

#Question id: 10178

#Unit 6. System Physiology – Plant

Heliotropism is another term used to describe leaf orientation by solar tracking. Some plant species, such as soybean, have leaves that can display different movement such as

a. When the well watered condition plant shows diaheliotropic movements

b. When the well watered condition plant shows Para heliotropic movements

c.  When the water stress condition plant shows paraheliotropic movements

d. When the water stress condition plant shows diaheliotropic movements

Select Correct combination about soyabean plant;

#Question id: 10179

#Unit 6. System Physiology – Plant

A a plant to invest energy in developing multiple cell layers, they are shaped like pillars that stand in parallel columns one to three layers deep. Below the epidermis, the top layers of photosynthetic cells are called

#Question id: 10180

#Unit 6. System Physiology – Plant

The non uniformly distribution of chloroplast, light is only  absorbed by the chlorophyll molecules in the cholorplast rest of the light penetrates to the cell known as

#Question id: 10181

#Unit 1. Molecules and their Interaction Relevant to Biology

#Question id: 10182

#Unit 1. Molecules and their Interaction Relevant to Biology