What are the four main classes of biochemical compounds?

What are the four main classes of biochemical compounds?

3.3 Summary

  • Biochemical compounds are carbon-based compounds found in living things.
  • There are millions of biochemical compounds, but all of them fall into four major classes: carbohydrates , lipids, proteins , and nucleic acids .
  • Carbohydrates include sugars and starches.
  • Lipids include fats and oils.

What group of organic compounds include starch?

Organic Compounds

Proteins Carbohydrates
Elements C, H, O, N, S C, H, O
Examples Enzymes, muscle fibers, antibodies Sugar, glucose, starch, glycogen, cellulose
Monomer (small building block molecule) Amino acids Monosaccharides (simple sugars)

What are the classes of biochemical compounds?

Classes of Biochemical Compounds

Class Elements Examples
Carbohydrates carbon hydrogen oxygen sugars starches cellulose
Proteins carbon hydrogen oxygen nitrogen sulfur enzymes hormones
Lipids carbon hydrogen oxygen fats oils
Nucleic acids carbon hydrogen oxygen nitrogen phosphorus DNA RNA

What is the most common class of biochemical compounds?

Nucleic acids are biological polymers made from nucleotides. They’re the most complex of the classes of biochemical compounds and are built from many parts, including sugars, which are themselves carbohydrates.

What are the six biochemical elements of life?

The chemical abbreviations for the six most common elements of life make up the acronym CHNOPS. These elements are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. The CHNOPS elements come together and interact to form biomolecules.

What is meant by biochemical?

1 : of or relating to biochemistry. 2 : characterized by, produced by, or involving chemical reactions in living organisms a biochemical defect in the brain. Other Words from biochemical More Example Sentences Learn More about biochemical.

What’s another word for biochemical?

Biochemical Synonyms – WordHippo Thesaurus….What is another word for biochemical?

biological chemical
synthetical synthesisedUK

What is a biochemical feature?

The physiological and biochemical features include data on growth at different temperatures, pH values, salt concentrations, or atmospheric conditions, and data on growth in the presence of various substances such as antimicrobial agents, the presence or activity of various enzymes, and with respect to metabolization …

What is a biochemical test?

Biochemical tests are used to identify bacterial species by differentiating them on the basis of biochemical activities. The difference in protein and fat metabolism, carbohydrate metabolism, enzyme production, compound utilization ability, etc. are some factors that aid in bacterial identification.

What are the types of biochemical tests?

Summary of Biochemical Tests

  • Catalase Test.
  • Mannitol Salt Agar (MSA)
  • Blood Agar Plates (BAP) Streak-stab technique.
  • Taxos P (optochin sensitivity testing)
  • Taxos A (bacitracin sensitivity testing)
  • CAMP Test.
  • Bile Esculin Agar.
  • Nitrate Broth.

How do you prepare for a biochemical test?

Test Procedure

  1. Dilute your organism in a tube of sterile water to obtain a turbidity equivalent to the 0.5 McFarland test standard.
  2. Using a sterile 1mL pipette, place 1 mL of organism into the middle of the tube.
  3. Cap tightly; do not jostle.
  4. Incubate for 24 hours at 37°C.

What is a catalase test used for?

The catalase test is a particularly important test used to determine whether a gram-positive cocci is a staphylococci or a streptococci. Catalase is an enzyme that converts hydrogen peroxide to water and oxygen gas.

What is catalase activity?

Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals) which catalyzes the decomposition of hydrogen peroxide to water and oxygen.

What is the principle of the catalase test?

PRINCIPLE: The breakdown of hydrogen peroxide into oxygen and water is mediated by the enzyme catalase. When a small amount of an organism that produces catalase is introduced into hydrogen peroxide, rapid elaboration of bubbles of oxygen, the gaseous product of the enzyme’s activity, is produced.

What bacteria is positive for catalase test?

The catalase test separates staphylococci (positive) from streptococci and enterococci (negative). Bacillus is catalase-positive, and Clostridium spp.

What is the importance of catalase to certain bacteria?

What is the importance of catalase to certain bacteria? Allows certain bacteria to neutralize the toxic oxidizing agent (hydrogen peroxide) produced in metabolism to yield water and oxygen.

What is the catalase test used for quizlet?

Clinically, what is the catalase test used for? To differentiate between Staphylococcus (catalase-positive) and Streptococcus (catalase-negative), as both are Gram-positive cocci. 2. Use inoculating loop and mix a loopful of Staphylococcus aureus into the hydrogen peroxide.

Is E coli catalase positive or negative?

Biochemical Test and Identification of E. coli

Characteristics E. coli
Catalase Positive (+ve)
Oxidase Negative (-ve)
MR Positive (+ve)
VP Negative (-ve)

Is E coli urease positive?

Another generally urease negative bacterial species is Escherichia coli. Among E. coli strains, about 1% of urease-positive isolates were found. Urease is one of the major bacterial virulence factors during urinary tract infections caused by these bacteria [1, 24].

What foods is catalase found in?

Preparations of commercial catalase are produced mainly by extraction from bovine liver and, in recent years, from Aspergillus niger and Micrococcus luteus. Sweet potatoes are also a good source of catalase. Catalase has increasing potential uses in the food, dairy, textile, wood pulp and paper industries.

Which bacteria are oxidase positive?

Oxidase Positive Organisms: Pseudomonas, Neisseria, Alcaligens, Aeromonas, Campylobacter, Vibrio, Brucella, Pasteurella, Moraxella, Helicobacter pylori, Legionella pneumophila, etc.

Which bacteria is catalase-positive and oxidase-negative?


Catalase test: catalase-positive
Oxidase test: negative*
Spores: non-spore forming

What is the function of oxidase?

Oxidases are enzymes that catalyze the oxidation of CN and CO bonds at the expense of molecular oxygen, which is reduced to hydrogen peroxide. The three principal substrates classes for oxidase enzymes are amino acids, amines, and alcohols.

Is Staphylococcus oxidase positive or negative?

Staphylococci are facultative anaerobes Gram-positive bacteria that grow by aerobic respiration or by fermentation that yields principally lactic acid. The bacteria are catalase-positive and oxidase-negative.

What enzymes does Staphylococcus aureus contain?

Enzymes. S. aureus produces various enzymes such as coagulase (bound and free coagulases) which clots plasma and coats the bacterial cell, probably to prevent phagocytosis. Hyaluronidase (also known as spreading factor) breaks down hyaluronic acid and helps in spreading it.

What tests are used to identify Staphylococcus aureus?

Coagulase testing is the single most reliable method for identifying Staphylococcus aureus [9]. Coagulase production can be detected using either the slide coagulase test (SCT) or the tube coagulase test (TCT).

Does Staphylococcus aureus grow on MacConkey Agar?

MacConkey agar selects for organisms like Escherichia coli (Gram negative bacilli) while inhibiting the growth of organisms like Staphylococcus aureus (Gram positive cocci).

What bacteria can grow on MacConkey Agar?

Colony Morphology on MacConkey Agar

Organism Colour Remarks
Escherichia coli red/pink non-mucoid
Aerobacter aerogenes pink mucoid
Enterococcus species red minute, round
Staphylococcus species pale pink opaque

Does Staphylococcus aureus grow on nutrient agar?

Staphylococci can be isolated in routinely used bacteriological media like nutrient agar, blood agar or specific media like mannitol salt agar (MSA), lipovitellin salt mannitol agar (LSM), Vogel-Johnson agar (VJ), Baird Parker agar, potassium thiocyanate-actidione-sodium azide-egg yolk-pyruvate agar (KRANEP).