Note: Respond To All Questions From Part A To C A. Which ter is incorrectly defi

Question

Note: Respond To All Questions From Part A To C

A. Which ter is incorrectly defined? a. Orbital: the region around a nucleus where an electron is likely to be found b. Neutron: a subatomic particle that has mass but no charge c. Radioisotope: an unstable mass of an element that emits subatomic particles d. Atomic number: the number of atoms bonded together in a complex molecule B. Which of the following is least hydrophilic2 b. c. d. C. Vegetable oil Phospholipids CO2 What level ofprotein structure, characterized by -helices and -pleated sheets. results from hydrogen a. Primary b. Secondary c. Quatemary d. Both tertiary and quatemary

Explanation / Answer

A. The answer is option D.

Atomic number is defined as the number of protons in the nucleus of an atom.

B. The answer is option b.

Vegetable oil is the least hydrophilic substance, i.e they have decreased affinity for water and is insoluble in water.

C. The answer is option b.

The secondary level of protein structure is characterised by alpha helices and beta pleated sheets. Alpha helices are of spiral shape which results from hydrogen bonding between amine and carbonyl groups; beta helices are straight chains of amino acids held in a parallel fashion due to hydrogen bonding between carbonyl and amino groups of peptide backbone.

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