The thylakoid in chloroplast are arranged as
interconnected disc
interconnected sacs
stacked discs
none of the above
The non- photosynthetic, non- symbiotic N2 fixing bacteria are
Rhodobacter
Spirillum
Azotobacter
All of these
In monocot roots which types of vascular bundles are found?
Collateral, conjoint and closed
Radial with exarch xylem
Bicollateral, conjoint and closed
Radial with endarch xylem
Which one is antioxidant vitamin?
Vitamin- D
Vitamin- E
Vitamin- B
Vitamin- K
B.
Vitamin- E
Antioxidant vitamins are Vitamin C, Vitamin E and - carotene. They are so called as they inactive oxygen free radicals. Free radicals are highly reactive particles that carry an unpaired electron [e-], they damage cell membranes, DNA, other cellular structures and contribute to formation of artery narrowings and atherosclerosis.
In bacteria respiration occurs in
cytoplasmic membrane
mitochondria
nuclear membrane
endoplasmic reticulum