Lab Act 3 Chemistry Of Life

Question 1

are made up of chemical substances. These substances make up the structures of organisms and react to bring about metabolism that result into the different activities of living things.

Answer 1

Living things

Question 2

Living things are made up of both

Answer 2

Inorganic and organic compounds

Question 3

-is the most abundant inorganic substance in the living system and it functions primarily as the medium of life.
- it is an excellent solvent wherein thermoregulator

Answer 3

Water

Question 4

Other inorganic materials are

Answer 4

Salts and Minerals

Question 5

that make up the organisms are the carbohydrates, lipids, proteins and nucleic acids.

Answer 5

Organic substances

Question 6

are major sources of energy as well as structural components of living things.

Answer 6

Carbohydrates and lipids

Question 7

the most structural organic substances in the organism and function as structural components as well as important biological molecules.

Answer 7

Proteins

Question 8

are polymers of nucleotides and are used in the process of protein synthesis in the endoplasmic reticulum.

Answer 8

Nucleic acid

Question 9

are organic catalyst and they hasten chemical reactions in living system without being altered in the process. They are proteins by nature and thereby easily denatured and are highly specific.

Answer 9

Enzymes

Question 10

Test for Sugar

Glucose + Benedict’s Solution

Answer 10

Benedict’s solution is blue, but if there are any simple carbohydrates, it will turn green or yellow if there are few, and red if there are many.

Question 11

Test for Sugar
Water+ Benedict’s Solution

Answer 11

-No change means negative
-The sugar test’s negative control is water mixed with Benedict’s reagent. It exhibits a poor test outcome (no sugar present)

Question 12

Test for Lipid

Starch + Iodine Solution

Answer 12

In the presence of starch, it turns into a dark green color due to the formation of starch-iodine complex.

Question 13

Test for lipid
Water+Iodine solution

Answer 13

It accepts an electron from
the oxygen atom, affecting
how it absorbs light. When
you shake the fluids, the
iodine leaves the water turns
yellow.

Question 14

Brown Paper + Oil

Answer 14

In the presence of lipids, the brown paper turns translucent (allows light to pass through).

Question 15

Brown Paper + Water

Answer 15

It shows that after the evaporation of water that lipids are not present.

Question 16

Sudan IV + Water + Oil

Answer 16

Red color could be a sign of a positive Sudan IV test response. This test will produce good findings if lipid is present.

Question 17

Albumin + Millon’s Reagent

Answer 17

A red precipitate is formed which indicates the presence of proteins

Question 18

Water+ Millon’s Reagent

Answer 18

A negative reaction indicates the absence of protein

Question 19

Albumin + Biuret’s Reagent

Answer 19

A positve control for the protein test is egg albumin combined with biurets reagent. It exhibits a favorable test outcome (protein is present)

Question 20

Water+ Biuret’s Reagent

Answer 20

The protein test’s negative control is water + Biuret’s reagent. It exhibits a poor test outcome (no protein present).