Bios 1705 - Study guides, Class notes & Summaries

BIOS 1705 Quiz 1 (Labs 1-4) Latest Version 100% Pass - **What happens to the image of the letter "e" when viewed through a microscope if it's mounted right-side up?** - It appears upside down - **If you move the slide toward the upper right area of the stage, where does the image move within the field of view?** - It moves to the bottom left - **Why is it important to center objects in the field of view before switching from low to high power on a compound light microscope?...

BIOS 1705: Lab Quiz 1 with Verified Solutions - **What part of the microscope moves the slide around the stage?** - Stage adjustment knobs - **Which lens is closest to the eye when using a microscope?** - Ocular - **What knob should you use to focus at low power only?** - Coarse adjustment knob - **What does the condenser do in a microscope?** - Concentrates the light on the specimen - **If you have a high power objective lens with a magnification of 40x, what would be the ...

3 domains of the tree of life - Bacteria, Archaea, Eukarya 4 kingdoms of eukarya - Protista, Plantae, Fungi, Animalia arm - use to safely carry the microscope coarse adjustment knob - use to focus at low power ONLY competative inhibition - when molecules similar to a substrate compete for placement on the active site of an enzyme, Vmax is still possible is substrate concentration is high enough Condenser - concentrates the light on the specimen control treatment - a treatment in which you...

If you mount the slide so that the letter "e" is right side up as seen with the naked eye, how does it look through the microscope? Ans: upside down What happens if you move the slide toward the upper right area of the stage. What direction does the image move? Ans: it moves to the bottom left of the field of view (opposite of the way you move) Why must objects be centered in the field of view before going from low to high power using the compound light microscope? Ans: so you know ...

arm - use to safely carry the microscope coarse adjustment knob - use to focus at low power ONLY condenser - concentrates the light on the specimen controlled variable - the variable that could impact the outcome of the experiment by does not because it is held constant and not varied; ex) light, temperature, etc dependent variable - what is measured, observed or counts; must be specific and quantitative; ex) heart rate diffusion - movement of particles from an area of high concentration ...

condenser Ans: concentrates the light on the specimen high power objective Ans: 40x ocular Ans: lens nearest to the eye stage adjustment knobs Ans: moves a slide around the stage low power objective Ans: 4x arm Ans: use to safely carry the microscope stage Ans: platform on which the slide is mounted iris diaphragm Ans: controls the amount of light reaching the specimen medium power objective Ans: 10x coarse adjustment knob Ans: use to focus at low power ONLY fine adjustment k...

A competitive inhibitor: - A substance that reduces the activity of an enzyme by binding to the enzyme's active site in place of the substrate. A competitive inhibitor's structure mimics that of the enzyme's substrate. Enzymes increase the rate of a reaction because they: - A. bind to the transition state lowering the activation energy. In this lab we will measure the activity of the enzyme lactase by reading the absorbance of light at a wavelength of 420 nm passed through the samples. ...

How is color of light absorbed versus reflected shown in the absorption spectra experiment? - Answer-- The peaks of absorption for visible light were in the low wavelength range (violet to blue) and high range (red). This makes sense because: o It shows that the pigments (especially the 2 chlorophylls absorbed red and blue best) o Those same 2 colors powered the most photosynthesis in the leaf disc experiment. What colors of light do plants use for photosynthesis? - Answer-Plants use colors...