1. If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately
(1) 2.5 meters
(2) 2.2 meters
(3) 2.7 meters
(4) 2.0 meters
Answer (2)
2. Bilaterally symmetrical and acoelomate animals are exemplified by
(1) Platyhelminthes
(2) Aschelminthes
(3) Annelida
(4) Ctenophora
Answer (1)
3. Match the following columns and select the correct option.
Answer (1)
4. Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
(1) Peroxisomes
(2) Golgi bodies
(3) Polysomes
(4) Endoplasmic reticulum
Answer (2)
5. The QRS complex in a standard ECG represents
(1) Depolarisation of auricles
(2) Depolarisation of ventricles
(3) Repolarisation of ventricles
(4) Repolarisation of auricles
Answer (2)
6. Match the following columns and select the correct option.
Answer (3)
7. Experimental verification of the chromosomal theory of inheritance was done by
(1) Sutton
(2) Boveri
(3) Morgan
(4) Mendel
Answer (3)
8. Identify the incorrect statement.
(1) Sapwood is involved in conduction of water and minerals from root to leaf
(2) Sapwood is the innermost secondary xylem and is lighter in colour
(3) Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
(4) Heart wood does not conduct water but gives mechanical support
Answer (2)
9. Match the following columns and select the correct option.
Answer (2)
10. Match the organism with its use in biotechnology.
Select the correct option from the following:
Answer (1)
11. Identify the substances having glycosidic bond and peptide bond, respectively in their structure
(1) Glycerol, trypsin
(2) Cellulose, lecithin
(3) Inulin, insulin
(4) Chitin, cholesterol
Answer (3)
12. Name the enzyme that facilitates opening of DNA helix during transcription.
(1) DNA helicase
(2) DNA polymerase
(3) RNA polymerase
(4) DNA ligase
Answer (3)
13. If the head of cockroach is removed, it may live for few days because
(1) the cockroach does not have nervous system.
(2) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
(3) the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
(4) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
Answer (2)
14. Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
(1) (c) and (d)
(2) (a), (b) and (d)
(3) only (d)
(4) (a) and (b)
Answer (4)
15. By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
(1) Mutational breeding
(2) Cross breeding
(3) Inbreeding
(4) Out crossing
Answer (2)
16. Which one of the following is the most abundant protein in the animals?
(1) Collagen
(2) Lectin
(3) Insulin
(4) Haemoglobin
Answer (1)
17. How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
(1) 2
(2) 14
(3) 8
(4) 4
Answer (2)
18. The body of the ovule is fused within the funicle at
(1) Micropyle
(2) Nucellus
(3) Chalaza
(4) Hilum
Answer (4)
19. Which of the following is correct about viroids?
(1) They have free RNA without protein coat
(2) They have DNA with protein coat
(3) They have free DNA without protein coat
(4) They have RNA with protein coat
Answer (1)
20. The number of substrate level phosphorylations in one turn of citric acid cycle is
(1) One
(2) Two
(3) Three
(4) Zero
Answer (1)
21. The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
(1) Nitrate alone
(2) Ammonia and oxygen
(3) Ammonia and hydrogen
(4) Ammonia alone
Answer (3)
22. Match the following diseases with the causative organism and select the correct option.
Answer (1)
23. From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
(1) CH3, H2, NH4 and water vapor at 800°C
(2) CH4, H2, NH3 and water vapor at 600°C
(3) CH3, H2, NH3 and water vapor at 600°C
(4) CH4, H2, NH3 and water vapor at 800°C
Answer (4)
24. Which of the following statements is correct?
(1) Adenine pairs with thymine through one H-bond
(2) Adenine pairs with thymine through three H-bonds
(3) Adenine does not pair with thymine
(4) Adenine pairs with thymine through two H-bonds
Answer (4)
25. Match the following with respect to meiosis
Select the correct option from the following
Answer (1)
26. Choose the correct pair from the following
(1) Polymerases - Break the DNA into fragments
(2) Nucleases - Separate the two strands of DNA
(3) Exonucleases - Make cuts at specific positions within DNA
(4) Ligases - Join the two DNA molecules
Answer (4)
27. Select the option including all sexually transmitted diseases.
(1) Gonorrhoea, Malaria, Genital herpes
(2) AIDS, Malaria, Filaria
(3) Cancer, AIDS, Syphilis
(4) Gonorrhoea, Syphilis, Genital herpes
Answer (4)
28. Embryological support for evolution was disapproved by
(1) Alfred Wallace
(2) Charles Darwin
(3) Oparin
(4) Karl Ernst von Baer
Answer (4)
29. The roots that originate from the base of the stem are
(1) Primary roots
(2) Prop roots
(3) Lateral roots
(4) Fibrous roots
Answer (4)
30. In gel electrophoresis, separated DNA fragments can be visualized with the help of
(1) Ethidium bromide in UV radiation
(2) Acetocarmine in UV radiation
(3) Ethidium bromide in infrared radiation
(4) Acetocarmine in bright blue light
Answer (1)
31. Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?
(1) High concentration of Progesterone
(2) Low concentration of LH
(3) Low concentration of FSH
(4) High concentration of Estrogen
Answer (4)
32. Goblet cells of alimentary canal are modified from
(1) Columnar epithelial cells
(2) Chondrocytes
(3) Compound epithelial cells
(4) Squamous epithelial cells
Answer (1)
33. Snow-blindness in Antarctic region is due to
(1) Inflammation of cornea due to high dose of UV-B radiation
(2) High reflection of light from snow
(3) Damage to retina caused by infra-red rays
(4) Freezing of fluids in the eye by low temperature
Answer (1)
34. Match the following concerning essential elements and their functions in plants
Select the correct option
Answer (2)
35. Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to
(1) Fungal diseases
(2) Plant nematodes
(3) Insect predators
(4) Insect pests
Answer (4)
36. Ray florets have
(1) Superior ovary
(2) Hypogynous ovary
(3) Half inferior ovary
(4) Inferior ovary
Answer (4)
37. Montreal protocol was signed in 1987 for control of
(1) Emission of ozone depleting substances
(2) Release of Green House gases
(3) Disposal of e-wastes
(4) Transport of Genetically modified organisms from one country to another
Answer (1)
38. Identify the wrong statement with regard to Restriction Enzymes.
(1) They cut the strand of DNA at palindromic sites.
(2) They are useful in genetic engineering.
(3) Sticky ends can be joined by using DNA ligases.
(4) Each restriction enzyme functions by inspecting the length of a DNA sequence.
Answer (3)
39. The infectious stage of Plasmodium that enters the human body is
(1) Sporozoites
(2) Female gametocytes
(3) Male gametocytes
(4) Trophozoites
Answer (1)
40. Meiotic division of the secondary oocyte is completed
(1) At the time of copulation
(2) After zygote formation
(3) At the time of fusion of a sperm with an ovum
(4) Prior to ovulation
Answer (3)
41. The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
(1) 1 molecule of 3-C compound
(2) 1 molecule of 6-C compound
(3) 1 molecule of 4-C compound and 1 molecule of 2-C compound
(4) 2 molecules of 3-C compound
Answer (1)
42. Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
(1) (c) and (a)
(2) (a) and (b)
(3) (b) and (c)
(4) (d) and (c)
Answer (3)
43. Match the following columns and select the correct option.
Answer (1)
44. Which of the following pairs is of unicellular algae?
(1) Gelidium and Gracilaria
(2) Anabaena and Volvox
(3) Chlorella and Spirulina
(4) Laminaria and Sargassum
Answer (3)
45. In light reaction, plastoquinone facilitates the transfer of electrons from
(1) Cytb6f complex to PS-I
(2) PS-I to NADP+
(3) PS-I to ATP synthase
(4) PS-II to Cytb6f complex
Answer (4)
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