- Match column I with column II and choose the correct option.
Column I Column II
(Scientist) (Concept)
I. Meselson and Stahl A. Lac operon
II. Hershey and Chase B. DNA replicates
semi-conservatively
III. Beadle and Tatum C. One gene one enzyme
hypothesis
IV. Jacob and Monod D. DNA is the genetic
material
E. Transcription
(a) I - B, II - E, III - A, IV - C
(b) I - C, II - D, III - B, IV - A
(c) I - B, II - D, III - C, IV - A
(d) I - A, II - E, III - D, IV - B
- DNA finger printing technique was first developed by
(a) Jeffreys, Wilson and Thien
(b) Boysen and Jensen
(c) Schleiden and Schwann
(d) Edward and Steptoe.
- Choose the correct pair.
(a) Coconut, Cucurbits - dioecious
(b) Honey bee, Rotifers - parthenogenesis
(c) Ornithorhynchus, Whale - viviparous
(d) Frog, Peacock - external fertilisation
- Which one of the following correctly describes homologous
structures?
(a) Organs with anatomical similarities, but performing
different functions
(b) Organs with anatomical dissimilarities, but perform
same function
(c) Organs that have reduced or do not perform any
function
(d) Organs that appear only in embryonic stage and
disappear later in the adult
- Retting is a process by which bacteria bring about
(a) curdling of milk
(b) separation of fibres
(c) synthesis of various vitamins
(d) both (a) and (c).
- Select the group of the three codons which could bring a
halt in protein synthesis.
(a) UGG, UCG, UAU (b) UUC, UUA, UAC
(c) UAG, UGA, UAA (d) UUG, UCA, UCG
- Select the correct pair of microorganism and the product
obtained from it.
(a) Monascus purpureus - produces large holes in Swiss
cheese
(b) Saccharomyces cerevisiae - used for the distillation of
wine and beer
(c) Streptococcus - produces streptokinase which is used
to remove clots
(d) Aspergillus niger - produces citric acid and butyric acid
- Fats absorbed into lacteals as chylomicrons are
(a) monoglycerides (b) fatty acids
(c) triglycerides (d) glycerol.
- Which of the following disorders are caused due to recessive
autosomal mutations?
(a) Turner’s syndrome and sickle cell anaemia
(b) Edward’s syndrome and Down’s syndrome
(c) Cystic fibrosis and phenylketonuria
(d) Alzheimer’s disease and Huntington’s chorea
- Which one of the following has incorrect description?
(a) Lubb - sharp closure of AV valves at the beginning of
ventricular systole
(b) Dup - sudden opening of semilunar valves at the
beginning of ventricular diastole
(c) Pulsation of the radial artery - valves in the blood vessels
(d) Initiation of the heart beat - Purkinje fibres
- An oocyte is released from the ovary under the influence of LH
(a) before completing meiosis I and before polar bodies
are released
(b) after completing meiosis I
(c) after completing meiosis II
(d) before completing meiosis I and after release of polar
bodies.
- In most simple type of canal system of Porifera, water flows
through which one of the following ways?
(a) Ostia → Spongocoel → Osculum → Exterior
(b) Spongocoel → Ostia → Osculum → Exterior
(c) Osculum → Spongocoel → Ostia → Exterior
(d) Osculum → Ostia → Spongocoel → Exterior
- The quiescent centre in root meristem serves as a
(a) site for storage of food which is utilised during
maturation
(b) reservoir of growth hormones
(c) reserve for replenishment of damaged cells of the
meristem
(d) region for absorption of water.
- Which property among these listed below is not a criteria for
a molecule to act as a genetic material?
(a) Chemically and structurally stable
(b) Mutate slowly to facilitate evolution
(c) Express itself in the form of Mendelian characters
(d) Destroy itself after every cell cycle
- Which one of the following poultry birds is not an English
breed?
(a) Sussex (b) Australorp
(c) Orpington (d) Minorca
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