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Biology 143 – Delgado Test 1 Answered – Introductory Lab Concepts, Biomolecules, and Microscopy Review

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This document provides fully answered content from Test 1 in Delgado’s Biology 143 course. It reviews essential laboratory and theoretical concepts such as the scientific method, metric system, chemical tests (Benedict’s, Biuret, Iodine), microscope components and functionality, macromolecules, and solution controls. Designed for lab-based biology courses, it is an ideal guide for students preparing for practical or theoretical assessments. Keywords: microscope parts ocular lens field of view depth of field iris diaphragm Benedict’s reagent Biuret test iodine test grease spot test monomers and polymers proteins and lipids disaccharides and polysaccharides dehydration synthesis hydrolysis positive and negative controls precision vs accuracy metric conversions base units resolution and magnification

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Institution
Biology 143
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Biology 143

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Biology 143 Delgado Test 1-Answered
Accuracy - ANSWER-A description of how close a measurement is to the true value of
the quantity measured.

Base unit - ANSWER-a defined unit in a system of measurement that is based on an
object or event in the physical world

Benedict's reagent - ANSWER-an alkaline solution of copper(II)sulfate used in the
chemical tests for reducing sugars and non-reducing sugars. A brick-red precipitate
indicates a positive result.

binocular - ANSWER-pertaining to two or both eyes

Biuret test - ANSWER-A biochemical test for the presence of proteins.

body tube - ANSWER-Connects the eyepiece to the revolving nosepiece

Carbohydrates - ANSWER-the starches and sugars present in foods

Celsius - ANSWER-Metric unit for measuring temperature; On this scale water freezes
at zero and boils at 100.

condenser lens - ANSWER-located immediately below the specimen, focuses light from
the light source onto the specimen

Contrast Microscopy - ANSWER-shows presence of dye or other treatments

Control - ANSWER-In an experiment, the standard that is used for comparison

Conversions - ANSWER-the act or an instance of converting or the process of being
converted.

course adjustment knob - ANSWER-Moves the stage up and down for focusing; Cannot
be used during high power or the objective lens can crack

dehydration synthesis - ANSWER-A chemical reaction in which two molecules
covalently bond to each other with the removal of a water molecule.

density - ANSWER-mass/volume

Depth of Field (DOF) - ANSWER-The amount of your image that will be in
focus.

Disaccharides are - ANSWER-double sugars

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Biology 143

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