7/24/2019 Biology Quizgs

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BIOLOGY QUIZ1. Ordinary table salt is sodium chloride. What is baking soda?A. Potassium chlorideB. Potassium carbonateC. Potassium hydroxideD. Sodium bicarbonate

2.Movement of cell against concentration gradient is calledA. osmosisB. active transportC.difusionD. passive transport

3. Plants absorb dissolved nitrates from soil and convert them intoA. ree nitrogenB. urea

C. ammoniaD. proteins

4. ucleus! the genetic material containing rounded body in each cell! "as #rstdiscovered in 1$31 byA. Robert oo!eB. Robert Bro"nC. Rudol #ircho"D. $heodore Sch"ann

%. Most of the red! blue and &ur&le colours of &lants are due to a &igmentcalledA. anthocyanin

B. caroteneC. chlorophyllD. xanthophylls

'. Ptyalin is an en(yme &roduced in theA. salivary glandsB. pituitary glandsC. thyroid glandsD. pancreas

). Plants are killed in "inter by frostA. because o desiccation and mechanical damage to the tissuesB. because no photosynthesis ta!es place at such lo" temperature

C. because respiration ceases at such lo" temperatureD. because there is no transpiration

$. Organic *ubstances "hich! in very small amounts! control gro"th anddevelo&ment calledA. vitaminsB. hormonesC. en%ymesD. &one o the above

+. On "hich of the follo"ing &lants did ,regor Mendal &erform his classicale-&eriment?A. 'ram

B. (ai%eC. Pea

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D )heat

1. Poison glands of snakes are homologous toA. electric organs o *shesB. stings o raysC. sebaceous glands o mammals

D. salivary glands o vertebrates

/ns"ers

1. D

2. B

3. A

4. B

5. A

6. A

7. A

8. B

9. C

10.D