While studying transpiration, a scientist used a dentrometer to record the small daily changes in the diameter of a tree trunk at two differnet heights( 2 meters and 3 meters) above the ground at the same time. The diameter decreased in the daytime. This decrease happened first at a higher […]

Q1. For a cell to make proteins enzymes should access its genes as his tones are modified with acetyl groups, their positive charges are neutralized so they wrap DNA less tightly. how may this affect the rate of protein synthesis? Q2. A recessive mutant allele, black, causes a very dark […]

Q1. An experiment is designed to learn the mechanism of sucrose uptake by plant cells. Cells are immersed in a sucrose solution and pH of the solution is monitored. Samples of the cells are taken at intervals and their sucrose concentration is measured. Their sucrose uptake correlates with the rise […]

The epidermis of a leaf is removed from a leaf and sections of the epidermis incubated in different concentrations of mannitol (asugar alcohol that does not enter plant cells). In .1M mannitol the epidermal cells neither gain nor lose weight. Sections of the epidermis placed in .6M mannitol become flaccid […]