Are mannose and galactose, allose and altrose, gulose and talose, and ribose and arabinose diastereoisomers? consider only d-sugars. match the words in the left column to the appropriate blanks in the sentences on the right. d-mannose and d-galactose are because they are images. they differ in configuration about . d-allose and d-altrose are because they are images. they differ in configuration about . d-gulose and d-talose are because they are images. they differ in configuration about . d-ribose and d-arabinose are because they are images. they differ in configuration about .

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.