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3 questions

Identify the correct statement. Answer: 2. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria. Check each statement. Capping adds me... Transcription, genetic code, translation, protein biosynthesis 1 answer
Match Column - I with Column - II.Column - I (floral formulae) | Column - II(a) %♀♂ K(5) C1+2+(2) A(9)+1 G̱(1) | (i) Brassicaceae(b) ⊕♀♂ K(5) C(5) A5 G̱(2) | (ii) Liliaceae(c) ⊕♀♂ P(3+3) A3+3 G̱(3) | (iii) Fabaceae(d) ⊕♀♂ K2+2 C4 A2−4 G̱(2) | (iv) So… Answer: 1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) Identify the family from each floral formula. (a) Zygomorphic, K(5), C 1+2+(2), A (9)+1, s... Families: Malvaceae, Cruciferae, Leguminosae, Compositae, Gramineae 1 answer
Select the correct pair. Answer: 3. Cells of medullary rays that form part of cambial ring - Interfascicular cambium Check each pair. Large colourless empty cells in... Plant tissues and anatomy of root, stem, leaf 1 answer
In the exponential growth equation N_t=N_0e^rt, e represents : Answer: 3. The base of natural logarithms In N_t=N₀e^rt , e is Euler's number (about 2.718), the base of natural logarithms. The other names... Population attributes: growth, birth and death rate, age distribution 1 answer
What is the role of RNA polymerase III in the process of transcription in eukaryotes ? Answer: 2. Transcribes tRNA, 5s rRNA and snRNA In eukaryotes: RNA polymerase I transcribes 28S, 18S and 5.8S rRNA; RNA polymerase II transcr... Transcription, genetic code, translation, protein biosynthesis 1 answer
Plasmid pBR322 has PstI restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is used for inserting a gene for β-galactoside production and the recombinant plasmid is inserted in an E.coli strain Answer: 1. it will not be able to confer ampicillin resistance to the host cell. The PstI site lies inside the ampR gene. Inserting the fore... Tools: restriction enzymes, vectors, host 1 answer
Match List - I with List - II.List - I | List - II(a) S phase | (i) Proteins are synthesized(b) G2 phase | (ii) Inactive phase(c) Quiescent stage | (iii) Interval between mitosis and initiation of DNA replication(d) G1 phase | (iv) DNA replicationCho… Answer: 3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii) Match each phase: S phase: DNA replication, (a)-(iv). G2 phase: proteins are synthesised f... Cell cycle, mitosis, meiosis 1 answer
Which of the following statements is correct ? Answer: 2. Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy. Check each statement. Fusion of two cells is... Monera, Protista and Fungi 1 answer
Which of the following statements is incorrect ? Answer: 2. In ETC (Electron Transport Chain), one molecule of NADH+H ^+ gives rise to 2 ATP molecules, and one FADH ₂ gives rise to 3 ATP mo... TCA cycle and electron transport system, ATP yield 1 answer
In some members of which of the following pairs of families, pollen grains retain their viability for months after release ? Answer: 4. Rosaceae ; Leguminosae Pollen viability depends on the family. In cereals such as Poaceae it is lost within 30 minutes. In some m... Pollination: types, agencies, examples 1 answer
Match Column - I with Column - II.Column - I | Column - II(a) Nitrococcus | (i) Denitrification(b) Rhizobium | (ii) Conversion of ammonia to nitrite(c) Thiobacillus | (iii) Conversion of nitrite to nitrate(d) Nitrobacter | (iv) Conversion of atmosphe… Answer: 1. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) Match each bacterium with its role: Nitrococcus converts ammonia to nitrite: (a)-(ii). Rhi... Seed germination, phases and rate of growth, conditions of growth 1 answer
Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because : Answer: 3. mutated gene does not appear on a photographic film as the probe has no complimentarity with it. The radioactive probe is a singl... Processes of recombinant DNA technology 1 answer
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as : Answer: 2. Repetitive DNA DNA fingerprinting identifies differences in specific regions of DNA called repetitive DNA. These regions, such as... Human genome project and DNA fingerprinting 1 answer
Match List - I with List - II.List - I | List - II(a) Protein | (i) C=C double bonds(b) Unsaturated fatty acid | (ii) Phosphodiester bonds(c) Nucleic acid | (iii) Glycosidic bonds(d) Polysaccharide | (iv) Peptide bondsChoose the correct answer from t… Answer: 1. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii) Match each biomolecule with its bond: Protein: peptide bonds, (a)-(iv). Unsaturated fatty... Biomolecules: proteins, carbohydrates, lipids, nucleic acids 1 answer
Which one of the following organisms bears hollow and pneumatic long bones ? Answer: 1. Neophron Birds have light, hollow bones with air cavities (pneumatic bones) to help flight. Neophron (vulture) is a bird, so it h... Chordates up to classes 1 answer
Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as : Answer: 3. Myasthenia gravis An autoimmune attack on the neuromuscular junction causing fatigue and paralysis of skeletal muscle is myasthen... Skeletal system, joints and disorders 1 answer
Which of the following characteristics is incorrect with respect to cockroach ? Answer: 1. A ring of gastric caeca is present at the junction of midgut and hind gut. The incorrect statement is the one about gastric caeca... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli. Answer: 1. High pO ₂ , low pCO ₂ , less H ^+ , lower temperature Oxygen binds haemoglobin best where pO ₂ is high and pCO ₂ is low. At the a... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer
Sphincter of oddi is present at : Answer: 2. Junction of hepato-pancreatic duct and duodenum The sphincter of Oddi guards the opening of the common hepato-pancreatic duct int... Endocrine glands and hormones, mechanism of action 1 answer
The organelles that are included in the endomembrane system are : Answer: 2. Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles The endomembrane system includes organelles whose functions are coor... Endomembrane system: ER, Golgi, lysosomes, vacuoles 1 answer
Match List - I with List - II.List - I / List - II(a) Metamerism (i) Coelenterata(b) Canal system (ii) Ctenophora(c) Comb plates (iii) Annelida(d) Cnidoblasts (iv) PoriferaChoose the correct answer from the options given below. Answer: 3. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) Match each feature with its phylum. Metamerism (segmentation) - Annelida (iii) Canal syste... Non-chordates up to phyla 1 answer
A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is : Answer: 3. Palindromic Nucleotide sequences Restriction endonucleases recognise specific palindromic nucleotide sequences in DNA and cut at... Tools: restriction enzymes, vectors, host 1 answer
Which of the following RNAs is not required for the synthesis of protein ? Answer: 4. siRNA Protein synthesis (translation) needs mRNA (template), tRNA (carries amino acids) and rRNA (ribosome structure and catalysi... Transcription, genetic code, translation, protein biosynthesis 1 answer
The partial pressures (in mm Hg) of oxygen (O_2) and carbon dioxide (CO_2) at alveoli (the site of diffusion) are : Answer: 1. pO ₂ = 104 and pCO ₂ = 40 Standard values in the alveoli are pO ₂ = 104 mm Hg and pCO ₂ = 40 mm Hg. pO ₂ 40 and pCO ₂ 45 are deox... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer

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