EJE 1 All statements baccalaureate international 2011 ©

10 Biology NalName Student

45 min - 21 Feb 2012 Paper I

1. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight [1] a. proton b. cation c. ion d. compound

2. An atom's central core, containing protons and neutrons. [1] a. atomic nucleus b. atomic mass c. atomic number d. atomic weight

3. One of two or more atoms with the same atomic number but with different numbers of neutrons. [1] a. isotope b. proton c. atom d. ion

4. A chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement of the atoms. [1] a. electronshells b. molecule c. structural formula d. molecular formula

5. Lipids are made of these elements... (in alphabetical order separated by commas) [1] a. carbon, hydrogen

b. unsaturated c. energy d. cellmembrane

6. The number of protons in an atom. [1] a. Atom b. ionic bond c. Atomic number d. Atomic Mass

7. Substance formed by two or more elements in definite proportions (ex. water, carbon dioxide) [1] a. compound b. Atom c. ion d. molecule

8. The total number of protons and neurtrons. [1] a. Atomic number b. Atom c. Atomic Mass d. ionic bond

9. The smallest part of a compound (water is made up of 2 molecules of hydrogen and one molecule of Oxygen) [1] a. compound b. element

Banda I 18-20 7

16-17 6

14-15 5

12-13 4

9-11 3

3-7 2

1-2 1

Banda II 23-25 7

20-22 6

19-18 5

17-15 4

14-10 3

5-9 2

1-4 1

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c. molecule d. Isotope

10. The process of making an RNA copy of one gene. [1] a. Transcription b. Trait c. Translation d. Replication

11. A single chain of amino acids. [1] a. Helicase b. Polypeptide c. Replication d. Enzyme

12. RNA that carries information from the nucleus to the ribosomes. [1] a. rRNA b. RNA c. tRNA d. mRNA

13. RNA that carries amino acids to ribosomes. [1] a. rRNA b. tRNA c. RNA d. mRNA

14. The enzyme which puts together the nucleotides in DNA replication [1] a. DNA Polymerase b. RNA Polymerase c. Helicase d. Polypeptide

15. A two-stranded nucleic acid that holds genetic information for the long-term [1] a. DNA b. rRNA c. mRNA d. RNA

16. DNA to RNA to Proteins. [1] a. Translation b. Central Dogma of Biology c. Point Mutation d. ChromosomalMutations

17. The anticodon region of a transfer RNA is a sequence of three bases that are complementary to a codon in the mRNA. [1] a. anticodon b. Codon c. Mutation d. histone

18. The "Building blocks" of proteins. [1] a. anticodon b. amino acids c. Mutation d. Translation

19. Enzyme responsible for adding complementary base pairs and proofreads the new double stranded DNA. [1] a. helicase b. DNA replication c. RNA polymerase d. DNA polymerase

20. Process where DNA codes for RNA in the nucleus of a cell. [1] a. Transcription b. Point Mutation c. anticodon

d. Translation

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Paper II 1.Draw and label a diagram showing the structure of water molecules to show their polarity and hydrogen bond formation. (Draw means to represent by means of pencil lines and labels means to add labels to a diagram.) [4]

2. List three examples each of monosaccharides, disaccharides and polysaccharides.[3] (List means to give a sequence of names or other brief answers with no explanation.)

3. Write a word equation for each of the following. (a) hydrolysis of maltose [2]

(b) the condensation reaction that forms a triglycerides [2]

(e) hydrolysis of starch to remove a single molecule. [2]

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4.Distinguish between the following pairs of words. (a) Protein and polypeptide [2]

(b) Fat and oil [2]

(e) Starch and glycogen [2]

(d) Condensation and hydrolysis [2]

(e) Hydrophobic and hydrophilic. [2]

(f) Organic and inorganic compounds [2]