CBSE Questions for Class 12 Engineering Chemistry Biomolecules Quiz 7 - MCQExams.com

Which hormone affects physical appearance?
  • Male and female sex hormones
  • Steroid hormones
  • Growth hormones
  • Gonadotropin-releasing hormones
The adrenal glands consist of :
  • lower adrenal and upper paradrenal sections
  • ACTH and BCTH sections
  • the inner and outer layer of the kidney
  • the inner medulla and the outer cortex
Which of the following is substituted purines?
  • Adenine
  • Cytosine
  • Thymine
  • Uracil
Hormones fall into two basic categories:
  • Stimulator hormones and receptor hormones
  • Male hormones and female hormones
  • Non-steroid (peptide) hormones and steroid hormones
  • Inter-organ and inter-organismic
The primary target organ of aldosterone is :
  • the kidney
  • the pancreas
  • the liver
  • all of the above
A metal present in vitamin $${B}_{12}$$ is:
  • aluminium
  • zinc
  • iron
  • cobalt
Which of the following is true about alpha amino acids?
  • If the amino group at the chiral carbon lies on the left hand side as in L-(-)-glyceride, the amino acid belongs to L-series.
  • If it is towards right as in D-(+)-glyceraldehyde, it is said to belong to D-series.
  • Both of the above
  • None of the above
Steroid hormones lead to the :
  • destruction of normal DNA
  • replication of hormones by the cell DNA
  • synthesis of new enzymes
  • alteration of the Krebs cycle
Parathyroid hormone (PTH):
  • stimulates the release of calcium by the kidneys
  • stops the absorption of calcium from the intestine
  • causes blood calcium level to decrease
  • causes blood phosphate level to decrease
Which of the following is not a fat soluble vitamin?
  • Vitamin - B complex
  • Vitamin - D
  • Vitamin - E
  • Vitamin - A
The alkali resistant nucleic acid is:
  • DNA
  • tRNA
  • mRNA
  • rRNA
The general formula of disaccharides is __________ .
  • $$C_{12}H_{22}O_{10}$$
  • $$C_{12}H_{22}O_{12}$$
  • $$C_{12}H_{22}O_{11}$$
  • none of these
Thymidylate is a:
  • purine base
  • nucleoside
  • nucleotide
  • pyrimidine base
Thymine is exclusively present in?
  • DNA
  • tRNA
  • mRNA
  • rRNA
The prosthetic group present in nucleoprotein is __________ .
  • carbohydrate
  • lipid
  • nucleic acid
  • none of the above
Starch is composed of amylose and ________ .
  • amylopectin
  • maltose
  • glycogen
  • none of the above
The simplest amino acid is _________ .
  • alanine
  • glycine
  • lysine
  • valine
What is the functional group present in tryptophan?
  • alcohol
  • amino acid
  • aldehydes
  • ketone
Ornithine is a non-protein amino acid.
  • True
  • False
Starch is converted to maltose by the enzyme _______ .
  • lipase
  • protease
  • amylase
  • none of the above
Iodine gives blue colour with:
  • glucose
  • lactose
  • starch
  • heparin
Vitamin $$B_1$$ is:
  • riboflavin
  • ascorbic acid
  • cobalamin
  • thiamine
Hormones are secreted by ductless glands of human body. Iodine containing hormone is:
  • testosterone
  • adrenaline
  • thyroxine
  • insulin
Which of the following amino acids is basic in nature?
  • Valine
  • Tyrosine
  • Arginine
  • Leucine
Water insoluble component of starch is:
  • amylopectin
  • amylose
  • cellulose
  • none of these
Which one of the following vitamins is water soluble?
  • Vitamin $$B$$
  • Vitamin $$E$$
  • Vitamin $$K$$
  • Vitamin $$A$$
When a carbohydrate reacts with $$NaBH_4$$, the product is an:
  • Alditol
  • Aldaric acid
  • Aldonic acid
  • Aglycone
In the Molisch reagent the substance used is:
  • $$\beta$$ naphthol in alchol
  • $$\alpha$$ naphthol in alchol
  • Reasrcinol in alchol
  • Rosaniline in water
Firmly attached organic cofactor of holoenzyme is
  • Transferase
  • Activator
  • Modulator
  • Prosthetic group
Lysine is _____________.
  • Neutral amino acid
  • Acidic amino acid
  • Basic amino acid
  • Heterocyclic amino acid
A molecule of Stachyose contains how many carbon atoms ?
  • 6
  • 12
  • 18
  • 24
A glycoside is the carbohydrate form of an :
  • Ether
  • Acetal
  • Aglycone
  • Alcohol
Sulfur containing amino acid is :
  • Alanine
  • Proline
  • Tyrosine
  • Cysteine
Which one of the following is correct about $$H$$-bonding in nucleotide?
  • $$A-T$$, $$G-C$$
  • $$A-G$$, $$T-C$$
  • $$G-T$$, $$A-C$$
  • $$A-A$$, $$T-T$$
Only a little quantity of which of these can influence the rate of chemical reaction
  • Hormone
  • Enzyme
  • Alkaloids
  • None of the above
Enzyme invertase hydrolyses
  • Sucrose into glucose and fructose
  • Cellulose into starch
  • Glucose into sucrose
  • Starch into sucrose
Constitutive enzymes are
  • Operational all the time
  • House keeping enzymes
  • Alloenzymes
  • Both A and B
Hydrolysis of starch involves the use of the enzyme: 
  • maltase
  • zymase
  • invertase
  • diastase
Molecules which can also function as biocatalysts are
  • Polysaccharides
  • RNAs
  • Fatty acids
  • None of the above
Alloenzymes are
  • Enzyme precursors
  • Similar enzymes formed from different genes
  • Different enzymes of an enzyme system
  • Antienzymes
Iron containing haeme is attached with globin of haemoglobin as
  • Coenzyme
  • Apoenzyme
  • Prosthetic group
  • Inorganic group
Which of these is a non-protein enzyme?
  • $$\alpha$$-amylase
  • Nitrogenase
  • Histidine kinase
  • Ribozyme
Papain is obtained from
  • Ficus carica
  • Carica papaya
  • Glycine max
  • Citrus reticulata
The amino acid containing mercaptan unit is:
  • leucine
  • glutamine
  • cysteine
  • lysine
  • isoleucine
Which of the following amino acid is neutral ?
  • Aspartic acid
  • Glycine
  • Lysine
  • Arginine
Progesterone is secreted by:
  • Thyroid
  • Ovaries
  • Adrenal
  • Testes
Which of the following test is performed by carbohydrates?
  • Biuret test
  • Nitroprusside test
  • Ninhydrin test
  • Molisch's test
For which vitamin liver is not the source ?
  • Vitamin - $$B_2$$
  • Vitamin - $$B_1$$
  • Vitamin - $$B_{12}$$
  • Vitamin - $$H$$
Which of the following differs in nature from others?
  • Vasopressin
  • Thyroid
  • Oxytocin
  • Insulin
Which of the following is a pheromone?
  • Linalool
  • Disparlure
  • BHA
  • Alitame
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