3. Which of the following is   NOT   optically active? 
(A)
(B)
(C)
(D)

11. An example of programmed cell death is the differentiation of: (A) parenchyma cells. (B) collenchyma cells. (C) cells of the cortex. (D) the secondary cell wall. (E) tracheary elements.

12. Which of following lists the correct root developmental sequence during primary plant body, the formation of (I) lateral root; (II) the cortex; (III) the epidermis; (IV) the stele? (A) I, IV, II, III (B) III, II, IV, I (C) III, I, II, IV (D) I, III, II, IV (E) II, III, I, IV 

1. Which of the following statements is correct? Refer to the structure shown below: (A) nine 1º carbons, two 2º carbons, two 3º carbons, and two 4º carbons (B) eight 1º carbons, two 2º carbons, three 3º carbons, and two 4º carbons (C) eight 1º carbons, two 2º carbons, one 3º carbons, and two 4º carbons (D) eight 1º carbons, two 2º carbons, two 3º carbons, and two 4º carbons (E) eight 1º carbons, two 2º carbons, two 3º carbons, and one 4º carbons

2. Which of the following has an   INCORRECT   IUPAC name?  (A) (B)(C)(D)(E)

4. Which of the following nomenclature is INCORRECT? (A)(B) (C)   (D)

5. Which of the following statements is correct? (A) (i) and (iv) are identical (B) (i) and (ii) are enantiomers (C) (i) and (iii) are enantiomers (D) (ii) and (iv) are diastereomers

6. Which of the following is an   INCORRECT   representation of (2R,3S)-3-Bromo-2-iodopentane? (A)(B)(C)(D)

7. Which of the following is an aromatic compound? (A)(B)(C)(D)

8. Which of the products from the following reactions is INCORRECT?  

9. Which of the following choices does   NOT   describe the most stable chair conformation for the structures shown? (A)(B)(C)(D) CI