Carbohydrates

Q. Carbohydrates, the most abundant biomolecules on Earth, are produced by:

1. Some bacteria, algae and green plants
2. Fungi, algae and green plant cells
3. All bacteria, fungi and algae
4. Viruses, fungi and bacteria

Q. The general chemical formula of carbohydrate is:

1. (CH${}_2$O)${}_n$
2. (CH${}_2$O)${}_2$${}_n$
3. C${}_n$H${}_2$${}_n$O
4. (CHO)${}_n$

Q. What is pseudopeptidoglycan?

Q. Chemosynthetic bacteria obtain energy from:

1. Sun
2. Infra red rays
3. Organic substances
4. Inorganic chemicals

Q. Go through the following statements regarding the disorders of the digestive system. Choose the correct statements and select appropriate options from the codes given below:

I. Indigestion is caused by the poor secretion of digestive enzymes, overeating, anxiety and a lot of junk food.

II. Constipation, an irregular movement of bowl is caused due to poor food habits, fibreless diet, emotional stress and certain drugs.

III. Indigestion can be caused by milk of magnesia.

IV. Ejection of stomach content is controlled by hypothalamus of prosencephalon.

1. All statements are correct
2. All statements are incorrect
3. I and II statements are correct
4. III and IV statements are correct

Q. What are the different ways in which glucose is oxidised to provide energy in various organism ?

Q.

Choose the correct option to fill in the blanks : The term 'Carbohydrates' is derived from a Greek word called (i)______ and was coined by (ii)______. Each carbohydrate molecule has basic units called (iii)______ and the most abundant carbohydrate in the biosphere is (iv)______.

1. Lipido Bloor Fatty Acids MGDG

2. Nuclein Miescher Nucleotides DNA

3. Proteios Mulder Amino acids Collagen

4. Sakkharon Carl Schmidt Monosaccharides Cellulose

Q.

Name the following
An organic waste produced in man.

Q. Following diagram shows the demonstration of aerobic respiration–


What result can be drawn from it?

1. The experiment shows that ${\text{CO}}_2$ is evolved in an aerobic respiration of seeds
2. It shows that ${\text{O}}_2$ is evolved in an aerobic respiration of seed
3. Aerobic respiration takes place in the seed in the absence of free oxygen
4. The potassium hydroxide forms ${\text{O}}_2$ and water

Q. Which of the following options correctly identifies the structural formulae shown in figure?

	A	B
(A)	Fructose	Ribose
(B)	Glucose	Deoxyribose
(C)	Glucose	Ribose
(D)	Glucose	Fructose

1. A
2. B
3. C
4. D

Q.

In carbohydrates, the ratio of hydrogen: oxygen is ________.

Q. Match the Column-I & Column-II Column I Column II

A) ${\mathrm{MoO}}_2^{2+}$	1) Alcoholic dehydrogenase
B) ${\mathrm{Mg}}^{2+}$	2) Nitrogenase
C) ${\mathrm{Zn}}^{2+}$	3) Catalase
D) ${\mathrm{Fe}}^{3+}$	4) PEP carboxylase

1. A-2, B-4, C-3, D-1
2. A-2, B-1, C-4, D-3
3. A-4, B-2, C-1, D-3
4. A-2, B-4, C-1, D-3

Q.

___________ is the stored form of carbohydrates in plants.

Q.

Hibernating animals have tissues containing mitochondira with a membrane protein that accelerates electron transport while blocking the synthesis of ATP. What is the consequence of this?

1. Energy is saved because glycolysis and the citric acid cycle shuts down.

2. The energy of respiration is converted into heat

3. Hibernating animals can synthesize fat instead of wasting energy of respiration

4. Pyruvate is converted to lactic acid by anaerobic fermentation

Q. The stoichiometric formula of carbohydrates is .

1. ${\mathrm{CH}}_{2}O$
2. $({\mathrm{CH}}_{2}O{)}_n$
3. ${\left(C_2\mathrm{HO}\right)}_n$
4. ${\left({\mathrm{CHO}}_2\right)}_n$

Q. Which one of the following statements is not true?

1. Pollen grains are rich in nutrients, and they are used in the form of tablets or syrups
   
2. Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.
   
3. Honey is made by bees by digesting pollen collected from flowers.
   
4. The flowers pollinated by flies and bats secrete odour to attract them
   

Q. Classify the following into monosaccharides, oligosaccharides and polysaccharides.
(1) starch, (2) glucose, (3) stachyose, (4) maltose, (5) raffinose,
(6) cellulose, (7)sucrose, (8) lactose.

Q. Q. A healthy person eats the following diet 5 gm raw sugar, 4 gm albumin, 10 gm pyre buffalo ghee adulterated with 2 gm vegetable ghee and 5 gm lignin. How many calories he is likely to get? a) 126 b) 164 c) 112 d) 144

Q.

Which elements are required to make sugar? Also give the chemical formula of sugar.

Q. Why carbohydrates are important in our diet?

Q.

What is the total amount of carbohydrate (in grams) required to obtain 96 calories?

1. 12 g

2. 24 g

3. 32 g

4. 48 g

Q. If you eat 4 rotis made up of wheat flour each weighing 25 gm then how many kcal energy would you get?
(100 gm wheat flour contains 70 gm carbohydrates, 12 gm proteins, and 2 gm fat)

1. 342
2. 346
3. 345
4. 348

Q. The product of which has been commercialised for lowering blood cholesterol

1. Trichoderma polysporum
   
2. Monascus purpureus
3. Saccharomyces cerevisiae
   
4. Aspergillus niger

Q. Food is transported in plants in the form of

1. Glucose
2. Sucrose
3. Lactose
4. Fructose

Q. Which of the following is the sweetest sugar?

1. Fructose
2. Lactose
3. Sucrose
4. Glucose

Q. Spindle fibres are made up of _______ protein.

1. tubulin
2. actin
3. flagellin
4. RNA

Q. How are carbohydrates stored in plants ?

Q. In maltose, between which of the following carbons there is a linkage?

1. C2, C3
2. C1, C2
3. C1, C4
4. C2, C4

Q. Which carbohydrate does not have $C_x(H_{2}O{)}_y$ general formula?

1. Stachyose
2. Rhamnose
3. Fructose
4. Melitriose

Q. Explain how carbohydrates are used by living organisms.