________ is the ability to distinguish two objects that are close together as separate. When using a light microscope, this ability is determined by ________.
Fill in the blank(s) with the appropriate word(s).
Resolution; lambda (?, or wavelength)
You might also like to view...
A scientist is researching the germination rates of different Arabidopsis thaliana mutants. The seeds from one of her mutants always fails to germinate, even if she exposes them to red light
Interestingly, she notices that all of her mutant seeds contain Pr but never Pfr (even after several days under red light). In these plants, what might the mutation affect? A. The mutation increases the conversion of Pr to Pfr. B. The mutation inhibits the conversion of Pr to Pfr. C. The mutation inhibits the conversion of Pfr to Pr.
There are how many different kinds of RNA codons?
a. 3 b. 72 c. 28 d. 64 e. 120
Hydropathy analysis of a membrane protein's amino acid sequence predicts the protein's transmembrane segments and orientation in the membrane
It is necessary to confirm those predictions with experimental analysis. One experimental approach for plasma membrane proteins is to use the protease trypsin to digest extracellular domains of these proteins. (Trypsin is hydrophilic and cannot cross the plasma membrane to enter the cell.) When added to cells, trypsin digests the hydrophilic portions of plasma membrane proteins exposed outside the cell into small fragments but will not have access to transmembrane or cytosolic regions of proteins. Design a general experiment using trypsin and SDS-PAGE to address membrane protein association and orientation, and describe specific expected results that would be consistent with the following predicted membrane protein associations and orientations: a. a singlepass integral membrane protein with only its N-terminus exposed on the extracellular surface b. a singlepass integral membrane protein with only its C-terminus exposed on the extracellular surface c. a multipass integral membrane protein with only three hydrophilic loops exposed on the extracellular surface d. a fatty acylated protein e. a GPI-anchored protein What will be an ideal response?
The lining of the digestive tube is formed from:a
endoderm. b. ectoderm. c. germ cells. d. mesoderm. e. pseudoderm.