Which one of the following cellular parts is correctly described?
Options
(a) Centrioles – Sites for active RNA synthesis (b) Lysosomes – Optimally active at a pH of about 8.5 (c) Thylakoids – Flattened […]
Select the correct statement from the following regarding cell membrane.
Options
(a) Na⁺ and K⁺ ions move across cell membrane by passive transport (b) Proteins make up 60 to 70% of the cell membrane. […]
Given below is a sample of a portion of DNA strand. What is so special shown in it? 5′ – GAATTC – 3′ 3′ – CTTAAG – 5′
Options
(a) Replication completed (b) Deletion […]
Select the correct option with respect to mitosis.
Options
(a) Chromatids separate but remain in the centre of the cell in anaphase (b) Chromatids start moving towards opposite poles in telophase (c) Golgi complex […]
Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres?
Options
(a) Metaphase – I (b) Metaphase – II (c) Anaphase – I (d) Anaphase […]
During the metaphase stage of mitosis spindle fibres attach to chromosomes at
Options
(a) Centromere (b) Kinetochore (c) Both centromere and kinetochore (d) Centromere, kinetochore and areas adjoining centromere
Correct Answer:
Kinetochore
Explanation:
Kinetochores […]
Macro molecule chitin is:
Options
(a) Phosphorus containing polysaccharide (b) Sulphur containing polysaccharide (c) Simple polysaccharide (d) Nitrogen containing polysaccharide
Correct Answer:
Nitrogen containing polysaccharide
Explanation:
Chitin or fungal cellulose that is nitrogen contgaining […]
A phosphoglycerate is always made up of:
Options
(a) only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached (b) a saturated or unsaturated fatty acid […]
Which of the following statements about enzymes is wrong?
Options
(a) Enzymes require optimum pH and temperature for maximum activity (b) Enzymes are denatured at high temperatures (c) Enzymes are mostly proteins but some […]
Which one of the following biomolecules is correctly characterized?
Options
(a) Lecithin – A phosphorylated glyceride found in cell membrane (b) Palmitic acid – An unsaturated fatty acid with 18 carbon atoms. (c) Adenylic […]
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