Author: Anonymous

Which sample(s) contain simple sugars? TEST SAMPLE A SAMPLE B SAMPLE C SAMPLE D Biuret + – – – Potassium iodide – – + – Benedict’s – – + + Translucence + + – –

Which sample is most likely to be fruit juice? TEST SAMPLE A SAMPLE B SAMPLE C SAMPLE D Biuret + – – – Potassium iodide – – + – Benedict’s – – + + Translucence + + – –

Nitrogen in animal wastes is often in the form of urea.  Plants cannot absorb and use the nitrogen as a nutrient in this form; it must be broken down by a series of reactions.   In the presence of water, the enzyme urease converts urea into ammonia and carbon dioxide.                                                       urease (NH2)2       +      H2O      ——–>           2NH3           +      CO2   urea               water                             ammonia           carbon dioxide   What are the substrates/reactants in this reaction?

At the beginning of this experiment a bag containing a yellow solution (water + yellow solute) was placed in a beaker containing a blue solution (water + blue solute). The results of the experiment are displayed here. Which color of solute was able to cross the membrane? [solute] What is the specific name of the process by which the solute crossed the membrane? [process]

Identify the cell structure labeled A. [a] Identify the cell structure labeled B. [b] Identify the cell structure labeled C. [c]

Which objective lens on our microscopes has the smallest field of vision?

  pH readings were obtained for different samples A, B and C.  Contained in each tube is a pH paper result.   Which of the tubes (A, B or C) contained an acid? [acid] Which tube contains an excess of hydroxide ions? [hydroxideions] Which substance may give you the result shown in tube A? Choose the number that corresponds with the answer. [number] 1.  H2SO4             2.  MgCl2             3.  LiOH

Which objective lens on our microscopes has the largest field of vision?

Identify this organelle. [organelle] Name the fluid-like component contained in this organelle. [fluid]

What is the name of the bond that joins the monomers in proteins?