Azad Jammu & Kashmir Public Service Commission

ajkpsc past papers lecturer of biology

Question No.1. Which of the following protein is involved in the termination of RNA synthesis?

1. Signe
2. Rho
3. Alpha
4. None

Question No.2. The bindlag site for RNA polymerase is called

1. Receptor
2. Facilitator
3. Promoter
4. Terminator

Question No.3.  Which of the following includes post transcriptional modifications?

1. S’ capping
2. Addition of poly A tail
3. Splicing
4. All of the above

Question No.4.  Gallstones are most often the result of;

1. Gallbladder-irritation
2. Precipitation of cholesterol
3. Eating cherries and swallowing the pits
4. Accumulated bile pigment

Question No.5.  Sponges are Included in which of the following phyla?

1. Cnidarian
2. Reptilian
3. Peripheral
4. Foraminifera

Question No.6.  _______Of the fallowing, which is NOT a viral disease?

1. Hepatitis
2. Tuberculosis
3. Chicken Pox
4. Rabies

Question No.7.   Surplus red blood cells, needed to meet an emergency, are MAINLY stored in what organ of the human body? Is It the:

1. Pancreas
2. Liver
3. Spleen
4. Kidneys

Question No.8. When a wound occurs in humans, the platelets in the blood activate a substance which starts the clotting process. The substance which starts the clotting is:

1. Adenosine
2. Lecithin
3. Histamine
4. Thrombin

Question No.9. During the final stage of cell division, the mitotic apparatus disappears, the chromosomes become attenuated, the centrioles duplicate and split, the nuclear membrane becomes reconstituted and the nucleolus reappears. This phase of cell division to known as:

1. Prophase
2. Anaphase
3. Metaphase
4. Telophase

Question No.10. Sickle cell anemia and Huntington’s chorea are both:

1. Virus-related diseases
2. Congenital disorders
3. Bacteria-related diseases
4. None of the above

Question No.11. Which of the following is NOT part of a neuron?

1. Synapse
2. Nissl bodies
3. Axon
4. Dendrite

Question No.12. Melatonin is produced by the:

1. Skin
2. Liver
3. Pineal gland
4. Pituitary gland

Question No.13. Which of the following statements is TRUE of insulin? Is it:

1. Secreted by the pancreas
2. A protein
3. Involved in the metabolism of glucose
4. All of the above

Question No.14. Bacteriophages are:

1. Bacteria
2. Viruses
3. Bacteria precursors
4. Agents which cause the production of bacteria

Question No.15. The AIDS viruses specifically attack which kind of cell?

1. B cells
2. Killer T cells
3. Helper T cells
4. Macrophages

Question No.34. The Process by which an amino acid loses its amine group is called:

1. Hydration
2. Oxidoamination
3. Deamination
4. Dehydration

Question No. 35. Bacteriophages are

1. Viruses
2. Bacteria
3. Bacteria Precursors
4. Agents which cause the production of bacteria

Question No.36. Mitochondrial DNA is

1. Circular double stranded
2. Linear double helix
3. Circular single stranded
4. None of these

Question No.37. The cellular organelles called “suicide bags” are

1. Lysosomes
2. Nucleolus
3. Ribosomes
4. Golgi’s bodies

Question NO.38. The Golgi complex

1. Synthesizes proteins
2. Provides a pathway for transporting chemicals
3. Produces ATP
4. Forms glycoproteins
5.  

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Question No.39. The following substances are cell inclusions except

1. Melanin
2. Lipids
3. Glycogen
4. Centrosome

Question No.40. The polysaccharide found in the exoskeleton of invertebrates is

1. Pectin
2. Cellulose
3. Chitin
4. Chondroitin sulphate

Question Ne.41. Cyclic AMP is farmed from ATP by the enzyme adenylatecyclase which is activated by the hormone:

1. Insulin
2. Testosterone
3. Epinephrine
4. Progesterone

Question No.42. Hexokinase has a high affinity for glucose than

1. Fructokinase
2. Glucokinase
3. Galactokinase
4. All of the above

Question No.43. Sulphur containing amino acid is

1. Methionine
2. Valine
3. Leucine
4. Asparagine

Question No.44. Non-essential amino acids

1. Are not components of tissue proteins
2. May be synthesized in the body from essential amino acids
3. Have no role in the metabolism
4. May be synthesized in the body in diseased states

Question No.45. The protein present in hair is

1. Keratin
2. Myosin
3. Elastin
4. Tropocollagen

Question No.46. The technique for purification of proteins that can be made specific for a given protein is

1. Gel filtration chromotography
2. Electrophoresis
3. lon exchange chromatography
4. Affinity chromatography

Question No.47. An immunoglobulin which can cross the placental barrier is

1. Iga
2. Igd
3. igm
4. None of these

Question No.48. The most abundant immunoglobulin in plasma is

1. Iga
2. Igm
3. Igg
4. Igd

Question No.49. Antibody diversity arises from

1. Gene amplification
2. Alternative splicing
3. Gene re-arrangement
4. All of these

Question No.50. Cell-mediated immunity is the function of

1. B lymphocytes
2. Plasma cells
3. T lymphocytes
4. Basophils

Question No.51. MHC proteins are unique to

1. Each cell
2. Each individual
3. Each organ
4. Each species

Question No.52. MIC class I proteins are present on toe of Surface of

1. B cell only
2. Macrophages only
3. T cells only
4. All cells

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Question No.53. MAC class 1) proteins, in conjunction with antigens are recognized by

1. Cytotoxic T cells
2. Suppressor T cells
3. Helper T cells
4. Memory T cells

Question No.54.  Cytotoxic T cells release

1. Perforins
2. Colony stimulating factors
3. Interleukins
4. Tumors necrosis factor

Question No.55, How many carbon atoms are present in Stearic cide

1. 16
2. 18
3. 17
4. 20

Question Nv.56. Which of the following arc essential fatty acids?

1. Linoleic acid
2. Arachidonic acid
3. T_inolenic acid
4. All of the above

Question No.57. Canola oil has saturated fat content.

1. 60%
2. 9%
3. 20%
4. 7%

Question No.58. Salts of free fatty acids and glycerol are produced in which of the following

1. Reactions
2. Hydrogenation
3. Saponification
4. Esterification
5. None

Question No.59. Which of the following carbohydrates contain B( 1-4) linkage?

1. Starch
2. Cellulose
3. Glycogen
4. None

Question No.60. All naturally occurring sugars are

1. L
2. D
3. Both L and D
4. None

Question No.61. When two glucose molecules join by a glycosidic linkage which of the following disaccharide farms?

1. Sucrose
2. Maltose
3. Lactose
4. None

Question No.62. Presence of 2 double bonds in stearic acid forms which of the following unsaturated fatty acid

1. Oleic acid
2. A linoleic acid
3. Linoleic acid
4. T linoleic acid

Question No.63. Non glycerides include which of the following molecule

1. Glycolipids
2. Waxes
3. Sphingolipds
4. Both b and c

Question No.64, Which of the following amino acid is non-polar

1. Lysine
2. Serine
3. Glutamic acid
4. Valine

Question No.65. These proteins are responsible for building arrangements in organisms.

1. Hormones
2. Structural proteins
3. Enzymes
4. Albumin

Question No.66. These proteins relay signals from one body part to another

1. Enzymes
2. Transport proteins
3. Hormones
4. Glucose

Question No.67. This is a common proteins hormone made in the pancreas.

1. Insulin
2. Collagen
3. Hemoglobin
4. Starch

Question No.68. Which of the following amino acids bas an amide side chain?

1. Aspartic acid
2. Asparagine
3. Glutamic acid
4. Methionine

Question No.69. The process of copying a gene’s DNA sequence into a sequence of RNA is called

1. Replication
2. Translation
3. Transcription
4. PCR

Question No.70. The first mrna codon to specify an amino acid is always

TAC

UAG

UAA

AUG

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