(c) fat, protein (d) sugar, ATP IB) sugar, fat 6. The scientific name of brewer\

Question

(c) fat, protein (d) sugar, ATP IB) sugar, fat 6. The scientific name of brewer's yeast, which is an excellent experimental organism used to study eukaryotic cells, is (a) E. coli (b) D. melanogaster (d) C. elegans (c)S. cerevisiae 7. Which subatomic particles contribute to the atomic mass for any given element? (a) protons (b) neutrons (c) protons and electrons (d) protons and neutrons 8. Carbon 14 is an unstable isotope of carbon that decays very slowly. Compared to the common, stable carbon 12 isotope, carbon 14 has two additional (a) electrons (b) neutrons (c) protons (d) ions 9. A covalent bond between two atoms is formed as a result of the (a) sharing of electrons. (b) transfer of electrons (c) sharing of protons (d) transfer of proton 10. Proteins are polymers made of the following (c) nucleotides (d) amino acids monomer molecules? (a) sugars (b) fatty acids Continued on the reverse side

Explanation / Answer

6. Correct answer:- (c) S. cerevisae
Explanation:-Brewer's yeast (Saccharomyces cerevisiae) is a species of yeast.
- It is used to winemaking, baking, and brewing.

7. Correct answer:- (d) protons and neutrons
Explanation:- An atom has three sub particles
Electron, proton, neuton.
- Atomic mass = protons+neutrons
- proton and neutron lie in nucleus.
- Electron found in the orbit outside the nucleus.

8. Correct answer:- (b) Neutrons
Explanation:- both carbon-12 and carbon-14 are two isotopes of the carbon.
-The difference between C-12 and C-14 is the number of neutrons in each atom.
-Atoms of both isotopes of carbon contain 6 protons.
- carbon-12 = 6 proton and 6 neutron
- carbon-14 = 6 proton and 8 neutron

9. Correct answer:- (a) Sharing of Electrons
Explanation:- covalent bond is made when two or more nonmetal atoms bond by sharing valence electrons.

10. Correct answer:- (d) amino acids
Explanation:- proteins are polymers of amino acids.

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