Lecture Week 2 - C1 - MOLECULES OF LIFE

What are the four components attached to the alpha carbon of an amino acid?

• Amine, carboxyl, methyl, phosphate

• Amino, carboxyl, hydrogen, R group

• Carbon, hydrogen, nitrogen, oxygen

• Nitrogen, sulfur, oxygen, methyl

Which of the following is CORRECT functional groups joined by a peptide bond to form a dipeptide?

• Carboxyl group & Amino group

• Amino group & carbonyl group

• Carboxyl group & hydroxyl group

• Amino group & hydroxyl group

How are amino acids grouped?

• By their size

• Based on carbon count

• Based on the R group properties

• According to atomic mass

Which type of amino acid has a hydrophobic R group?

• Polar amino acid

• Non-polar amino acid

• Basic amino acid

• Acidic amino acid

Which protein structure level involves hydrogen bonds between the backbone atoms?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

What happens to proteins at high temperatures or extreme pH?

• They become enzymes

• They become more flexible

• They get denatured

• They form stronger bonds

Which type of protein is generally insoluble and provides structural support?

• Globular protein

• Fibrous protein

• Simple protein

• Conjugated protein

Which RNA type carries genetic information from DNA to ribosomes?

• rRNA

• mRNA

• tRNA

• None of the above

Pentose sugar of RNA is

• ribose

• deoxyribose

• glucose

• fructose

Which of the following is NOT the type of RNA

• rRNA

• tRNA

• dRNA

• mRNA