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Which of the following ecological pyramids is generally inverted?
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Semiconservative replication was experimentally proved by Mathew Meselson and Franklin Stahl (1958) Reason (R): Meselson and Stahl used radioactive isotope 15N and equilibrium density gradient centrifugation technique. In the light of the above statements, choose the correct answer from the options given below:
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as
Goblet cells of alimentary canal are modified from
Match List-I with List-II: List-I A. Alfred Hershey and Martha Chase B. Euchromatin C. Frederick Griffith D. Heterochromatin List-II I. Streptococcus pneumoniae II. Densely packed and dark-stained III. Loosely packed and light-stained IV. DNA as genetic material confirmation
Which of the following is correct about H-bonding in nucleotide:
Which of the following statements is correct?
The Earth Summit held in Rio de Janeiro in 1992 was called
From the following, identify the correct combination of salient features of the Genetic Code:
Select the correct statement.
Which of the following statements is not correct?
Which of the following statements is incorrect?
Match the following columns and select the correct option. Column-I (a) Pituitary gland (b) Thyroid gland (c) Adrenal gland (d) Pancreas Column-II (i) Grave's disease (ii) Diabetes mellitus (iii) Diabetes insipidus (iv) Addison's disease
Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable. Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism. In light of the above statements, choose the most appropriate answer from the options given below:
Out of 64 codons, 61 codons code for 20 types of amino acids. This is often called:
Identify the wrong statement with reference to immunity.
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
Select the correct match: (1) Haemophilia - Y linked (2) Phenylketonuria - Autosomal dominant trait (3) Sickle cell anaemia - Autosomal recessive trait, chromosome-11 (4) Thalassemia - X linked
Identify the substances having glycosidic bond and peptide bond, respectively in their structure:
The enzyme enterokinase helps in conversion of