11). Mutation is
| A). a factor responsible for plant growth |
| B). a change which affects the offspring of F2 generation only |
| C). a change that is inherited |
| D). a change which affects the parents |
|
12). Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
| A). hormones |
| B). enzymes |
| C). proteins |
| D). vitamins |
|
13). Radish is a
| A). bulb |
| B). conn |
| C). modified root |
| D). tuber |
|
14). Outer covering of virus made up of protein is
| A). capsid |
| B). coat |
| C). virion |
| D). viriod |
|
15). Movements due to light are shown by
| A). flowering plants |
| B). lower plants |
| C). all land plants |
| D). all the plants |
|
16). Our major foods, fibres, spices, fruits and beverage crops are
| A). flowering plants |
| B). gymnosperms plants |
| C). pteridophytes |
| D). bryophytes |
|
17). Organic Substances which, in very small amounts, control growth and development called
| A). vitamins |
| B). hormones |
| C). enzymes |
| D). None of the above |
|
18). Radioactivity is a phenomenon of the spontaneous emission of
| A). protons (alpha particles) |
| B). electrons (beta particles) |
| C). gamma rays (short wave electromagnetic waves) |
| D). All of the above |
|
19). Plants that grow under average temperature and moisture are called
| A). halophytes |
| B). hydrophytes |
| C). mesophytes |
| D). xerophytes |
|
20). One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
| A). Having waited a day, it is too late to take an antibiotic |
| B). You need an antiseptic, not an antibiotic |
| C). You need to be vaccinated instead of taking an antibiotic |
| D). You are infected by a virus |
|
