Disulphide bonds Study guides, Revision notes & Summaries

Biochemistry: Concepts and Connections (Appling et al.) Chapter 1 Biochemistry and the Language of Chemistry 1) The water content in the human body is approximately: A) 90%. B) 80%. C) 70%. D) 60%. E) 50%. Answer: C 2) The four most abundant chemical elements in living systems are: A) hydrogen, oxygen, sulfur and phosphorus. B) hydrogen, carbon, nitrogen and oxygen. C) sodium, potassium, carbon and oxygen. D) sodium, potassium, nitrogen and sulfur. E) carbon, nitrogen, oxygen and potass...

Describe how you would use a biochemical test to show that a solution contained a non-reducing sugar, such as sucrose. [3] - ,first reducing sugars test; boil with dilute HCl acid then Neutralise with NaHCǑ, add benedict and heat to 95 degrees C brick red ppt forms if reducing sugar is present Describe a chemical test you could carry out to show that a piece of coconut contains lipids. [3] - (Crush in) ethanol / alcohol; Add (to) water (Order of adding is critical for this point); Emulsion...

Cosmetology Texas State Board Written Exam 827 Questions with Verified Answers When razor cutting it is recommended that the hair be cut? - CORRECT ANSWER Wet When cutting extremely curly hair it is recommended that the hair be cut? - CORRECT ANSWER Dry When cutting kinky hair, it is recommended the hair be cut? - CORRECT ANSWER Dry after straightening Which governmental agency mandates the use of a P.D. Test prior to using aniline derivative tints? - CORRECT ANSWER Food and Drug Adm...

The reactivity of an atom arises from Correct Answer: the existence of unpaired electrons in the valence shell. Covalent bonds differ from ionic and metallic bonds because in covalent bonding Correct Answer: pairs of electrons are shared Water contains 2 atoms of hydrogen and 1 atom of oxygen. What bond type holds these together Correct Answer: Covalent boding True or False? Polymerisation of monomers occurs due to covalent bonding between monomer units Correct Answer: True The s...

AQA A-Level Biology – Proteins Clearly Explained 2023Amino Acid - ANSWER A monomer that will join with other amino acids to form a protein Dipeptide - ANSWER Two amino acids bonded together via a peptide bond Polypeptide - ANSWER Many amino acids bonded together via peptide bonds Protein - ANSWER A combination of polypeptides Amine Group - ANSWER -NH2, a basic group where the amino part of amino acid comes from Carboxyl Group - ANSWER -COOH, an acidic group where the acid part o...

BPK 110 Final Exam Review Questions and answers, rated A+ Differentiate between complete and incomplete proteins and provide typical sources of each. - - Complete proteins: Have all nine essential amino acids. Ex. Animal sources of protein (milk, meat) Incomplete proteins: Lack one or more of the essential amino acids. Ex. Plant sources of proteins (legumes) Describe the molecular structure of proteins and the four levels of protein structure. Which bonds are essential to each level o...

BPK 110 Final Exam Review. Questions & Answers, VERIFIED/ Differentiate between complete and incomplete proteins and provide typical sources of each. - - Complete proteins: Have all nine essential amino acids. Ex. Animal sources of protein (milk, meat) Incomplete proteins: Lack one or more of the essential amino acids. Ex. Plant sources of proteins (legumes) Describe the molecular structure of proteins and the four levels of protein structure. Which bonds are essential to each level o...

ENZYMES: -lock + key vs induces fit -Reasons for enzymes specificity (TS) - -Formations of E-S complexes = main e.g. of imp of complementary fitting -Initial hypothesis = lock + key (only one specific mol binds-enzyme) -But more recently accepted hypothesis = induced fit: -because found that sim mols could still = complementary + bind to AS region of an enzyme (∴→e-s) -As complex = made, it allows a conformational change (by stretching + compressing bonds of sub) ∴ reaction can oc...

MT ASCP/AMT Final Assessment Exam 300 Questions with Verified Answers In absorption spectrophotometry: A) Absorbance is directly proportional to transmittance B) Percent transmittance is directly proportional to concentration C) Percent transmittance is directly proportional to the light path length D) Absorbance is directly proportional to concentration - CORRECT ANSWER Absorbance is directly proportional to concentration Which formula correctly described the relationship between ...

Cosmetology Texas State Board Written Exam 827 Questions with Verified Answers When razor cutting it is recommended that the hair be cut? - CORRECT ANSWER Wet When cutting extremely curly hair it is recommended that the hair be cut? - CORRECT ANSWER Dry When cutting kinky hair, it is recommended the hair be cut? - CORRECT ANSWER Dry after straightening Which governmental agency mandates the use of a P.D. Test prior to using aniline derivative tints? - CORRECT ANSWER Food and Drug Adm...