Class 11 Biology

The specific palindromic sequence which is recognized by EcoRI is (1) 5’- GGAACC – 3’ 3’- CCTTGG – 5’ (2) 5’- CTTAAG – 3’ 3’- GAATTC – 5’ (3) 5’- GGATCC – 3’ 3’- CCTAGG – 5’ (4) 5’- GAATTC – 3’ 3’- CTTAAG – 5’ Solution: (4) A palindromic ...

The plant parts which consist of two generations - one within the other (a) Pollen grains inside the anther (b) Germinated pollen grain with two male gametes (c) Seed inside the fruit (d) Embryo sac inside the ovule (1) (a), (b) and (c)                  (2) (c) and ...

Match the trophic levels with their correct species examples in grassland ecosystem. (a) Fourth trophic level                    (i) Crow (b) Second trophic level                  (ii) Vulture (c) First trophic level                       (iii)Rabbit (d) Third trophic level                      (iv) Grass Select the correct option (a)         (b)         (c)         (d) (1) (iii)        (ii)         (i)           (iv) (2) ...

Select the correct statement. (1) Glucagon is associated with hypoglycemia. (2) Insulin acts on pancreatic cells and adipocytes. (3) Insulin is associated with hyperglycemia. (4) Glucocorticoids stimulate gluconeogenesis. Solution: (4) Glucagon is associated with hyperglycemia. Insulin acts on hepatocytes and adipocytes and is associated with ...

Identify the incorrect statement. (1) Sapwood is involved in conduction of water and minerals from root to leaf (2) Sapwood is the innermost secondary xylem and is lighter in colour (3) Due to deposition of tannins, resins, oils etc., heart wood is dark ...

Match the following columns and select the Correct option. Column-I Column-II (a) Floating Ribs (i) Located between second and seventh ribs (b) Acromion (ii) Head of the Humerus (c) Scapula (iii) Clavicle (d) Glenoid cavity (iv) Do not connect with ...