This page contains over 50 sets of Biology Paper 3 Exams that are completely free to download. For the respective Confidentials (instructions to schools), and the marking schemes, click the links to the specific page.

2022年8月23日 · Use the reagents provided to test for the food substance present N in the piece of specimen reserved from (a). Observe and record in the table below.

2024年8月29日 · Food Tests Aim: To use qualitative reagents to test for a range of carbohydrates, lipids and proteins. To include: Benedict’s test for sugars, Iodine test for starch, the emulsion test for lipids and the Biuret reagent for protein

This document provides instructions for performing common food tests to identify starches, sugars, proteins, and lipids. It lists the main foods tested, reagents used to test each food, and expected reagent colors. Sample procedures and results are shown for testing unknown food samples for each macromolecule.

2022年5月6日 · You are provided with solution M which is a food substance. Procedure Using the reagents provided, test for the food substance present in substance M and complete the table below.

BIOLOGY PAPER 3 (PRACTICAL) TERM TWO TIME 1 ¾ HOURS FORM THREE INSTRUCTIONS TO CANDIDATES 1. Write your name and Admission number in the space provided above. 2. Sign and write the date of examination in the space provided above. 3. Answer all questions in the spaces provided in this question paper. 4.

2024年11月25日 · Colour observed in food tests. Observations. You are required to make sensible observations using the five senses except taste. Correct observations are using senses like: Sight for example colour change, brightly coloured petals in a flower. Hearing for example effervence. Smell for example a gas with a pungent smell ,scented flowers among others.

During a practical investigation on food tests, students were provided with the following reagents. Benedict's solution Sodium hydrogen carbonate Dilute hydrochloric acid. (1 mark) (a) (b) 917735 Identify the food substance the students were to test. State the role of dilute hydrochloric acid and sodium hydrogen carbonate during the experiment.

c) On specimen X, carry out food tests using the re agents provided. Record your procedures, observations and conclusions in the table below. d) Cut the specimen 1.0cm from the tip as well as shown in the diagram into two parts:

2022年8月25日 · Food Test Procedure Observation Conclusion; Starch: To about 2ml of food substance (in a test tube). Add 2 drops of iodince solution: Color of iodine retained/ yellow brown; Reject; no change/ no observable change Accept; no color change: Starch absent: Vitamin C (Absorbic acid) To about 2ml of DCPip in a test tube. Add a drop of the food ...