STD 12 - 1. sexual reproduction in flowering plants — NEET STD 11 Science — Question

Calvin cycle occur in

Sun is not a source of energy is this ecosystem.

During light-dependent reactions, light energy is converted to chemical potential energy through the process of chemiosmosis in the chloroplasts.
Which of the following statements about this process is false?
(i) The electron carriers of phosphorylation are located in the thylakoid
(ii) During phosphorylation, the chloroplast stroma becomes more acidic than the interior of thylakoid membrane
(iii) Protons diffuse through the protein channels which are CF₀ of the ATP synthase molecules
(iv) ATP is formed from ADP + Pi on the stroma side of the thylakoid in the chloroplast.
(v) During phosphorylation, water splites to form H⁺+2OH^- yielding an e- to PS-II

Who first discovered genetic code

Which of the following statements are true for stamen and microsporangium ?
(i) A typical angiosperm anther is bilobed, dithecous.
(ii) The microsporangia develop further and become pollen sacs.
(iii) Microsporangium generally surrounded by four wall layers.
(iv) The epidermis, endothecium and middle layers of anther perform the function of protection.
(v) The innermost wall layer of anther is the tapetum and it nourishes the developing pollen grains.
(vi) Cells of the tapetum generally have one nucleus.

Choose correct statements for fermentation :
(i) Fermentation takes place under aerobic conditions in many prokaryotes and unicellular eukaryotes.
(ii) In fermentation, say by yeast, the incomplete oxidation of glucose is achieved
(iii) In fermentation pyruvic acid is converted to CO₂, and ethanol.
(iv) The enzymes, pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reactions.
(v) Other organisms like some bacteria converts lactic acid to pyruvic acid and CO₂.
(vi) In animal cells also, like muscles during exercise, when oxygen is inadequate pyruvic acid is reduced to lactic acid by lactate dehydrogenase.

All are membrane bound cell organelles except  or Which of the following cell organelles lacks a unit membrane

How many statements are correct from given sentences ?
(i) 'Dogs', 'Cats', 'Mammals', 'Wheat' is taxa
(ii) Processes of characterisation, identification, classification and nomenclature are basic to taxonomy
(iii) In early days classification based on evolutionary relationships between organisms
(iv) Linnacus used Systema Naturae as the title of his publication
(v) Systematics include identification, nomenclature and classification on the basis of evolutionary relationships between organisms.