11th class (FSc) Biology unit 11 MCQs
chapter 11 MCQs 11th Class Biology
Bioenergetics:
1. Which statement about ATP is not true?
a. Some ATP is used to drive the synthesis of storage compounds
b. It is used as an energy currency by all cells
c. It provides the energy for many different biochemical reactions
d. It is formed only under aerobic conditions
2. Magnesium is an important nutrient ion in green plants as it is an essential component of:
a. Chlorophyll
b. Cell sap
c. Glucose
d. Protein
3. When a green plant performs photosynthesis at its maximum rate:
a. The energy content of the plant will be low
b. The rate of water loss is low
c. The energy content will be unaffected
d. The water content of the plant will be low
4. Quantitative study of energy relationship in biological system is called:
a. Biodegradation
b. Bioenergetics
c. Biotechnology
d. Biosynthesis
5. Quantitative study of energy conservation in biological system is called:
a. Bioenergetics
b. Thermodynamics
c. Metabolism
d. Respiration
6. A kind of chemical link between anabolism and catabolism:
a. ATP
b. Protein
c. None of these
d. Glucose
7. All life on planet earth is powered by:
a. Electrical energy
b. Chemical energy
c. Atomic energy
d. Solar energy
9. Chloroplasts has a double membranous envelop that encloses dense fluid filled region known as:
a. Thylakoid
b. Matric
c. Granum
d. Stroma
10. The fluid filled region of the chloroplast is:
a. Era stroma
b. Matrix
c. Cytoplasm
d. Cisternae
11. The number of chloroplast in each mesophyll cell is about:
a. 20-100
b. 10-100
c. 20-200
d. 10-200
12. Each mesophyll cell of leaf has chloroplast about:
a. 20-100
b. 10-20
c. 100-20
d. 20-80
13. An instrument that measures the relative ability of different pigments to absorb different wavelengths of light is called:
a. Potometer
b. Electrocardiogram
c. Spectrophotometer
d. Photometer
14. Haem portion of haemoglobin is also a porphyrin ring but containing an iron atom instead of:
a. Sulpher atom
b. Nitrogen atom
c. Magnesium atom
d. Potassium atom
15. Chlorophyll a found in all photosynthetic organisms except:
a. Bacteria
b. Diatoms
c. Euglena
d. Red algae
16. Chlorophyll absorbs mainly wavelength of:
a. Indigo color
b. Green color
c. Violet-blue color
d. Yellow color
17. The accessory pigments found in chloroplasts are:
a. Bacterial chlorophyll
b. Chlorophyll a
c. Chlorophyll b and carotenoids
d. Chlorophyll c
18. Van Niel hypothesized that source of oxygen during photosynthesis:
a. Chlorophyll
b. Water
c. NADP
d. Carbon dioxide
19. Magnesium of chlorophyll is replaced in hemoglobin by:
a. Iron
b. Calcium
c. Phosphorus
d. Potassium
20. Porphyrin ring of chlorophyll is made up of four joined smaller:
a. Furanore rings
b. Pyranore rings
c. Phyto rings
d. Pyrrol rings
21. Energy poor inorganic oxidized compounds are reduced to energy rich carbohydrates during:
a. Development
b. Respiration
c. Growth
d. Photosynthesis
22. The head of chlorophll molecule is complex of:
a. Pyrrol ring
b. Benzene ring
c. Porphyrin ring
d. Mg ring
23. Light wavelength least absorbed by chlorophyll is:
a. Yellow
b. Violet
c. Orange
d. Blue
24. Haeme portion of haemeoglobin contains:
a. Fe+++
b. Mg++
c. Ca++
d. Fe++
25. The moment in plants when carbon dioxide released by respiration equal the quantity required by photosynthesis is termed as:
a. Chemiosmosis
b. Compensation point
c. Action spectrum
d. Homeostasis