Biology MCQs Test 2

Biology Test

 1. i\In ireland people are completely dependent on
a. potatoes
b.tomatoes
c. tobacco
d. red pepper

2. Capsium anum is the scientific name of
a. datura
b. tobacco
c.red pepper
d. black pepper

3. which one of the following is the favourite home garden vegetable that was once believed to be poisoned
a. physalis
b. lipersicum esculentum
c. soalanum meelangena
d, atropa belladona

4. photosynthetic autotrophs get their energy from
a. heat
b. inorganic molecules

c. organic molecules
d. light

5. in 1930 van neil hypothesised that oxygen atoms in the oxygen gas released by plants come from
a.carbon dioxide
b. water
c. glucose
d. chlorophyll

6. in plant cell .the dark reactions of photosyntheses takes place in
a. stroma
b. thylakoids
c.granum
d. lamellae

7. which of the following colurs of light work best for photosynthesis
a. green&blue
b. red%green
c. blue&red
d. violet&oraange

8. a description of wavelength absorbed by a pigment is called its
a. action apectrum
b. anteena cells
c. reaction center
d. absorption spectrum

9. production of NADPH in a chloroplast takes place during
a. dark reaction
b. non-cyclic photophosphyrlation
c. cyclic photophosphyrlation
d. chemiosis

10. which of thr following plant leaves are used for curing of ring worm skin disease
a. cassia alata
b. cassia fistula
c. bauhinia vegeteria
dd. tamarindus indica

11. which one of the following process releases a carbon dioxide molecule
a. glycolysis
b. lactic acid fermentation
c. alcoholic fermentation
d. hydrolysis of glycoen

12. when yeast is poducing wine, which of the following is not formed
a. pyruvic acid
b. acetyl co enzyme-A
c. ethanol
d. carbon dioxide

13. in the conversion of pyruvic acid to acetyl co eenzyme -A, pyruvic acid is
a. oxidised
b. isomerized
c. broken into one carbon fragment
d. reduced

14. how many carbon atomsare in an oxolacetate molecule, ehich joins with an acetyl group during step -1 in krebs cycle
a. 2
b.3
c.4
d.6

15. in ETC ,the final acceptor of electron is
a. cytochrome -b
b. cytochrome a3
c. oxygen
16. the atom within each cytochrome molecule that actually accepts and releases electrons is
a. carbon
b. iron
c. zink
d. oxygen
17. how many carbon atoms are in citric acid molecule?
a. four
b. six
c. three
d. five
18. in aerobic cellular respiration most of the ATP is synthesized during
a. electron transport chain
b. glycolysis
c. citric acid cycle
d. oxidation of pyruvate
19. in eukaryotic cell the krebs citric acid cycle and terminal electron transport take place
a. with in the nucleus
b. on rough ER
c. in the cytoplasm
d. with in the mitochondria
20. the inner membrane of mitochondria is very selective about  what it normally allows to leave the organelle.one molecule that regularly passes out of a mitochondria is
a. citric acid
b. ATP
c. pyruvic acid
d. glucose
21. the function of the mitochondrial cristac is to
a. prevent escape O2 gas
b. store co-enzyme-A
c. increase the surface area of the inner membrane
d. increase the avalibility of phospholipids
22. a source of protons for the protons for the proton gradient with in chloroplast is
a. water
b. chlorophyll
c. CH2O
d. phospholipids within thylakoids membranes
23. the molecule in the Calvin-Benson cycle that combines with carbon dioxide is
a. glyceraldehyde phosphate
b. ribulose biphosphate
c. phosphoenolpyruvate
d. 1, 3 biphosphoglycerate
24. how many carbon atoms are there in a molecule of glyceraldehyde phosphate
a. four
b. five
c. three
d. six
25. the source of hydrogen atom for the synthesis of glucose is
a. H2O
b. FADH2
c. n(CH2O)
d. NADPH
26. an edible fruit, the husk tomato obtained from the plant family the
a. poaceae
b. solanaceae
c. ceasalpiniaceae
d. cassia family