bilology module 2

Which of the following are functions of lipids?

Catalytic activity Storage of genetic information Storage of energy Membrane structure Catalytic activity and storage of genetic information

Which of the following are functions of carbohydrates?

Catalytic activity Storage of genetic information Storage of energy Structural support Catalytic activity and storage of genetic information

Which of the following are functions of proteins?

Catalytic activity Structural support storage of energy

Besides storing carbon, having structural functions and being involved in communication, what other role do carbohydrates have?

Storing Energy

In addition to storing carbon and building membranes what else are lipids used for in cells?

Storing energy

what roles do carbohydrates play in cells

Struture Storage of carbon storage of energy

Which of the following are functions of proteins?

They act as catalyststhey can be structuralthey can be for signalingthey can play a role in the immune system

What color indicates a positive reaction for the presence of protein using the Biuret test?

Violet

Proteins are composed of monomeric building blocks called amino acids.

amino acids

Proteins are polymers composed of

amino acids

What are the building blocks of proteins?

amino acids

Which of the tests is best suited for the detection of fat and oils? or test lipid?

brown paper

image______(letter) indicates a positive reaction for the presence of starch using the iodine test.

brown to ****Blue Black****

carbohydrates like glycogen and cellulose are polymers. What is a polymer?

carbohydrates like glycogen cellulose are polymers

In addition to storing carbon and energy, what else are lipids used for in cells?

constructing membranes

The negative control used in the chemical composition of cells experiments was _____.

distilled water

proteins that speed up biochemical reactions are called______>

enzymes

In experiments, it is common to include a sample of a substance known to react with the reagent. This allows the experimenter to verify that the test (reagent) is working correctly. This sample is known as a negative control.

false

The formation of a dark-blue or black color after the addition of iodine indicates that a sample contains lipids.

false

The formation of a green color after heating with Biuret reagent indicates that a sample contains reducing sugar.

false

Which of the following reagents is best suited for the detection of starch?

iodine

Which group of molecules are insoluble in water

lipid

In addition to storing carbon and energy, what else are lipids used for in cells?

lipid carbohydrates proteins

there are three types of molecules used to build the cell: Proteins, carbohydrates, and

lipids

Are lipids soluble or insoluble in water?

lipids are insoluble in water

a chain of many building blocks, like those found in cellulose, polypeptides, and nucleic acids, is known as a(n)

polymer

Starch is a

polysaccharide

Which category of macromolecules is associated with catalytic activity?

protein

Which classes of macromolecules have a significant role in energy storage?

proteins Lipids Carbohydrates

the linking of amino acid is used to build which macromolecule?

proteins polypeptides

Amylase is an enzyme that cuts ________into smaller molecules.

starch

Which of the following are functions of lipids?

storage of energy Storage of carbon Construnction of membranes

Polysaccharides are polymers composed of

sugar

What are the building blocks of polysaccharides such as glycogen?

sugars

Lipids are characterized primarily on the basis of their insolubility in

water

Match each reagent with type type of macromolecule that it can be used to detect: 1. Benedict's 2. Biuret 3. Iodine

1 Reducing sugar 2 Protein 3 Starch

Match each test with the substance it is used to detect the presence of. 1. Biuret test 2. Brown Paper test 3. Benedict's 4. Iodine

2 Lipids 1 Protein 3 Reducing sugars 4 Starch

carbohydrates like glycogen and cellulose are polymers. what is a polymer?

A chain of similar building blocks called subunits, or monomers.

starch, cellulose, glycogen, and polypeptides are all made from chains of many subunits, or building blocks. What is the name given to a chain composed of many subunits?

A polymer

which reagent is best suited for the detection of reducing sugars such as glucose?

Benedict's Reagent

Which of the following tests requires heating prior to observing results?

Benedict's test

Which of the following reagents is best suited for the detection of protein?

Biuret

image_______(letter)indicates a positive reaction for the presence of reducing sugar using Benedict's test.

Blue to ****Brown Red****

Which of the following are functions of proteins?

Energy, Contraction, Transport, Structural -They catalyze chemical reactions. -They transport ions and molecules across cell membranes. -They play a key role in the contraction of muscles. -They provide structural support for many animal tissues. -They can be for signaling -They can play a role in the immune system.

Which group of molecules are insoluble in water?

Lipids

Lipids can be used to store energy, store carbon, and also in the construction of the bilayer that makes up the cell _________.

Membrane

Besides storing carbon, storing energy, and being involved in communication, what other role do carbohydrates have?

Play a structural role

is this a positive or negative result for the presence of fats on a square of brown paper(20 minutes after application)?

the square look orange ****Negative***

The formation of a green color after heating with Benedict's reagent indicates that a sample contains reducing sugar.

true