In the following pairs of cellular processes or reactions ci

In the following pairs of cellular processes or reactions, circle the one that requires coupling to another energy source: Peptide bond formation Peptide bond hydrolysis Glycolysis Photosynthesis Protein folding Protein unfolding (denaturing) Exam Which of the following structures is smallest? bacteria eukaryotic cell nucleus ion channel red blood cell virus In SDS-PAGE of proteins: proteins are unfolded while being separated. proteins are separated by size. large proteins move more slowly. an ionic detergent is used. all of the above. Which of these molecules passes across membranes most easily? cholesterol glucose oxygen (O_2) sodium ion (Na^+) water (H_2O) Which of the following describes a transporter that i) requires ATP hydrolysis, and ii) moves solute A in to the cell and solute B out? active uniporter active antiporter passive antiporter active symporter passive symporter A potassium channel selectively conducts K+ instead of Na^+ ions, because:

Solution

6) glycolysis is used for generation of ATP whereas in plants photosynthesis used for generation of glucose ..glucose degradation occurs in glycolysis and in photosynthesis glucose production occurs

7) ion channel is smallest...ion channels are small membrane pores which are present in cell membrane and cell organells . average size of RBS IS 6-8microns, bacteria-0.5-5microns, nucleus-6microns, virus-20-400nm

8) e-all of the above...above method is called SODIUM DODECYLSULFATE POLYACRYLAMIDE GELELECTROPHORESIS.

9) e-water is universal fluid passses across the membrane easily ...but rest of the above acrosses membrane depends on selective permeability

10) active symporter ..utilizes energy in form ATP hydrolysis for transport of ions in and out of cell..are celled as active symporters..passive transporters ..there is no utilization of ATP.

11) potassium channels are designed to allow the flow of potassium ions across the membrane but block the other ions especially sodium ions. they typically composed of filter and gate which allows potassium but not sodium depends on environmental signals.