Organic Test 7

Front 1

5. Where in a cell is the DNA located?

Back 1

Nucleus and in mitochondria.

Front 2

5. Where in a cell is the RNA located?

Back 2

On ribosomes in the cytoplasm.

Front 3

6. What are the components of a nucleotide?

Back 3

Sugar, a Phosphate & One of 4 bases (Adenine, Guanine, Cytosine, Thymine)

Front 4

6. What are the components of a nucleoside?

Back 4

Nucleobase and a 5-carbon sugar (either ribose or deoxyribose)

Front 5

13. What is the difference in structure between D-ribose and 2-deoxyl-D-ribose?

Back 5

Same structure except at carbon 2.

D-ribose= hydroxyl group and hydrogen on carbon 2

2-deoxyl-D-ribose= two hydrogens.

Front 6

15. RNA and DNA refer to nucleic acids. Which part of the molecule is acidic?

Back 6

Phosphoric acids.

Front 7

17. What type of bond exists between the two phosphates in ADP?

Back 7

Anhydride bonds.

Front 8

23. The sequence of a short DNA segment is ATGGCAATAC. What name do we give to the two ends (terminals) of a DNA molecule?

Back 8

5' end and 3' end.

Front 9

23. The sequence of a short DNA segment is ATGGCAATAC. IN this segment, which end is which?

Back 9

The end drawn to the left is the 5' end. A is the 5' end, and C is the 3' end.

Front 10

23. The sequence of a short DNA segment is ATGGCAATAC. What would be the sequence of the complementary strand?

Back 10

GTATTGCCAT

5' 3'

Front 11

27. What is the nature of the interaction between histones and DNA in the nucleosomes?

Back 11

Electrostatic interactions.

Front 12

37. Which type of RNA has a sequence exactly complementary to that of DNA?

Back 12

mRNA

Front 13

53. How many different bases are present in a DNA double helix?

Back 13

FOUR

Front 14

1. To what end product is the energy of foods converted in the catabolic pathways

Back 14

ATP

Front 15

3. How many membranes do mitochondria have?

Back 15

2

Front 16

3. Which membrane is permeable to ions and small molecules?

Back 16

The outer membrane.

Front 17

7. How many high-energy phosphate bonds are in the ATP molecule?

Back 17

Two phosphate anhydride bonds.

Front 18

15. In the common catabolic pathway, a number of important molecules acts as carriers (transfer agents). Which is the carrier of phosphate groups?

Back 18

ATP

Front 19

15. In the common catabolic pathway, a number of important molecules acts as carriers (transfer agents). Which are the coenzymes transferring hydrogen ions and electrons?

Back 19

NAD+ and FAD

Front 20

15. In the common catabolic pathway, a number of important molecules acts as carriers (transfer agents). What kind of groups does coenzyme A carry?

Back 20

Acetyl groups.

Front 21

21. The fats and carbohydrates metabolized by our bodies are eventually converted to a single compound. What is it?

Back 21

Acetyl coenzyme A.

Front 22

29. Is ATP directly produced during any step of the citric acid cycle? Explain.

Back 22

No.

Front 23

31. why is a many-step cyclic process more efficient in utilizing energy from food than a single-step combustion?

Back 23

Allows the energy to be released in small packets.

Front 24

37. What are the mobile electron carriers of oxidative phosphorylation?

Back 24

Cytochrome c and CoQ.