BIOLOGY-XI

CHAPTER NO-02

TIME ALLOWED=60MINS ORGANIC MOLECULES TOTAL MARLS=60

Note : Encircle the correct options:

Q1: The branch of biology which explains the biochemical basis of life is called:
(a) Biophysics (b) Biotechnology (c) Biochemistry (d) biometery
Q2: Living cell contains a living material called:
(a) Protoplasm (b) Cytoplasm (c) Leaves (d) all of these
Q3: Chemically, cell contains 70 to 90% of ___________.
(a) Nitrogen (b) Water (c) Oxygen (d) Carbon
Q4: Only six elements, C, H, N, O, P, S make up _________ of the biochemicals.
(a) 50% (b) 70% (c) 98% (d) none
Q5: Due to ________ which holds the water molecules together, liquid water requires higher
amount of heat energy to change into vapors.
(a) Covalent (b) Ionic (c) Hydrogen (d) all of these
Q6: Water act as _______ to maintain the pH in living system.
(a) Buffer (b) Acid (c) Base (d) alkaline
Q7: The joining of two molecules by the removal of water is called:
(a) Condensation (b) Hydrolysis (c) a and d (d) dehydration
Q8: The breakdown of macromolecules by the adding of water is called:
(a) Condensation (b) Hydrolysis (c) a and b (d) dehydration
Q9: Chemistry of living world is known as:
(a) Organic (b) Inorganic (c) a and b (d) none
Q10: The sharing of electrons is called:
(a) Covalent bond (b) Ionic bond (c) Hydrogen bond (d) none
Q11: The transferring of electrons is called:
(a) Covalent bond (b) Ionic bond (c) Hydrogen bond (d) none
Q12: The bonding between hydrogen and electronegative element is called:
(a) Covalent bond (b) Ionic bond (c) Hydrogen bond (d) none
Q13: The name protein was suggested by ___________ in 1838.
(a) Edward (b) Bloor (c) Berzelius (d) all of bvove
Q14: Protein is the polymer which made up of monomers called:
(a) Triglyceride (b) Nucleotides (c) Amino acid (d) insulin
Q15: The amino acids are linked together by:
(a) Peptide bond (b) Phosphodiester bond (c) Glycoside bond (d) aminoside bond
Q16: There are __ basic amino acids:
(a) 25 (b) 30 (c) 15 (d) 20
Q17: All amino acids are same in structure except:
(a) C (b) -NH2 (c) COOH (d) R group
Q18: There are ___ basic structural levels of protein:
(a) 6 (b) 2 (c) 4 (d) all of these
Q19: which is the following correct order regarding protein structure.
(a) Hair, Insulin, Lysosome ,hemoglobin (b) Insulin,Hair, lysosome, haemoglobin,
(c) Insulin,Haemoglobin, lysosome, Hair (d) insulin,Hair, haemoglobin,lysosome
Q20: The structure having several bonds such as peptide hyderogen ionic and sulphide is
called:
(a) Lysomes (b) Spider web (c) Haemoglobbin (d) Insulin
Q21: When a polypeptide chain of amino acids become spirally coiled this structure is called:
(a) Primary (b) Secondary (c) Tertiary (d) Quaternary
Q22: The association of two or more polypeptide chains into large sized molecule is called:
(a) Primary (b) Secondary (c) Tertiary (d) Quaternary
Q23: As _______, protein accelerates the rate of metabolic reactions.
(b) Antigen (b) Enzymes (c) Hormones (d) effector
Q24: As _______, protein perform a wide variety of regulatory functions.
(a) Antigen (b) Enzymes (c) Hormones (d) cofactor
Q25: __________ are found to occur in all living cells both as building material and storage
substances.
(a) Nucleic acid (b) Protein (c) Lipid (d) Carbohydrates
Q26: The cannot be hydrolyzed further into simple sugars.
(a) Monosaccharide’s (b) Disaccharides (c) Polysaccharides (d) none
Q27: Glucose, fructose and galactose are the examples of:
(a)Pentose (b) Hexose (c) Triose (d) tetrose
Q28: _______ is found largely in combined state in lactose disaccharides.
(a) Fructose (b) Glucose (c) Galactose (d) Maltose
Q29: The carbohydrate molecule which yield 3 to 10 monosaccharide molecules on hydrolysis
are called:
(a) Monosaccharides (b) Disaccharides (c) Polysaccharides (d) Dextrin
Q30: It is stored in large amount of sugar cane and beet root.
(a) Lactose (b) Maltose (c) Sucrose (d) Galactose
Q31: It is the most important reserve food material of higher plants, found in cereals, legumes,
potatoes and other vegetables.
(a) Starch (b) Cellulose (c) Glycogen (d) All of these
Q32: It is the main constituent of plant cell-wall.
(a) Starch (b) Cellulose (c) Glycogen (d) Galactose
Q33: It is a reserve polysaccharide found mainly in bacteria, fungi and animals.
(a) Starch (b) Cellulose (c) Glycogen (d) Maltose
Q34: The term lipid proposed by _________ in 1943.
(a) Edward (b) Bloor (c) Berzelius (d) none
Q35: Acylglycerol consists of a glycerol molecule linked to three fatty acids also called:
(a) Triacylglycerol (b) Tetraglyceride (c) Triglyceride (d) both a & c

Q36: They do not contain any double bond between carbon atom. They are solid at room
temperature.
(a) Fats (b) Oils (c) a and b (d) waxes
Q37: They contain one or more than one double bond between carbon atom. They are liquid at
room temperature.
(a) Fats (b) Oils (c) a and b (d) terpens
Q38: ________ are simple lipids forming ester bond with molecule of long chain alcohol.
(a) Waxes (b) Terpenes (c) Triglyceride (d) Phospholipids
Q39: A type of lipids is similar to triglyceride of an oil, except that one fatty acid is replaced by
_____________ group.
(a) Sulphate (b) carbonates (c) Hydrate (d) Phsphate
Q40: Is a large and important class of lipids, built up of isoprenoid units.
(a) Carotenoids (b) Steroids (c) Terpenoids (d) all of these
Q41: Consists of three 6-membered carbon rings and one 5-membered carbon ring.
(a) Carotenoids (b) Steroids (c) Terpenoids (d) waxes
Q42: One of the most important steroid is __________, a component of animal cell membrane.
(a) Cholesterol (b) Steroids (c) Terpenoids (d) all of these
Q43: Consists of fatty acid like carbon chains which are conjugated by double bonds carrying six-
membered carbon ring at each end.
(a) Cholesterol (b) Carotenoids (c) Terpenoids (d) steroids
Q44: A 22-years old Swiss physician and chemist, _______________ isolated a substance from the
nuclei of puss cells.
(a) W.W woods (b) Bloor (c) Berzelius (d) Friedrich Miescher
st
Q45: 1 name of Nucleic acid is ____________.
(a) Nucleotide (b) Nucleoside (c) Nuclein (d) nucleolous
Q46: The monomer of Nucleic acid is:
(a) Nucleotide (b) nucleiosidl (c) nucleolus (d) all of above
Q47: Pentose sugar in DNA is:
(a) Deoxyribose (b) Ribose (c) a and b (d) hexose
Q48: Group of nitrogenous bases contains two rings:
(a) Purines (b) Pyrimidines (c) a and b (d) none
Q49: Group of nitrogenous bases contains one ring:
(a) Purines (b) Pyrimidines (c) a and b (d) none
Q50: DNA contains Thymine, while RNA contains:
(a) Uracil (b) Guanine (c) Adenine (d) none
Q51: The nitrogenous base combines with pentose sugar is called:
(a) Nucleus (b) Nucleoside (c) Nucleotide (d) all of these
Q52: Molecules ATP is a
(a) Lipid (b) Carbohydrates (c) Protien (d) Nucleic Acid
Q53: Which of the following is not associated with function of protein.
(a) Machenical support (b) regularatory function of cell (c) pigment produce (d) permeability
Q54: Energetic molecule consists of Adenine and three phosphate groups.
(a) ADP (b) ATP (c) NAD (d) COD
Q55: There are ______ letters in genetic code.
(a) 4 (b) 5 (c) 3 (d) 7
Q56: The most abundant carbohydrate in nature is
(a) fructose (b) cellulose (c) starch (d) glucose
Q57: The information of mRNA converted into the specific sequence amino acids which help to
synthesize the protein.
 (a) Transformation (b) Translation (c) Transcription (d) none
Q58: Conjugated molecules are also called cerebrosides.
(a) Lipoprotein (b) Glycoprotein (c) Glycolipids (d) nucleoprotien
Q59: Conjugated molecules are also called Mucoids:
(a) Lipoprotein (b) Glycoprotein (c) Glycolipids (d) none
Q60: Which of the following is correct:
(a). Glucose + fructose = maltose (b). Glucose + galactose = sucrose
(c). Glucose + glucose = maltose (d). Glucose + glucose = sucrose

“”Best of luck””
By: Sir. Parkash Kumar Rathore
Cell: 03412814654