Below are the Basic Botany MCQs and answers:
Top Botany MCQs 2024 For Test:
1➤ R.Q. Of fatty substances is generally:
ⓑ Unity
ⓒ More than one
ⓓ Less than one
2➤ R.Q. is maximum, when respiratory substrate is:
ⓑ Glucose
ⓒ Malice acid
ⓓ Protein
3➤ In succulent plants respiratory quotient is always less than one because of:
ⓑ Complete reduction
ⓒ Incomplete oxidation
ⓓ Incomplete reduction
4➤ If the volume of CO₂ liberated during respiration is more than the volume of O2 used, the respiratory substrate will be:
ⓑ Organic acids
ⓒ Proteins
ⓓ Carbohydrates
5➤ Hexose monophosphate shunt is:
ⓑ Conversion of glucose into pyruvic acid
ⓒ A process by which new products are synthesized
ⓓ Glycolytic pathway
6➤ Photorespiration takes place in:
ⓑ Glyoxysomes
ⓒ Peroxisomes
ⓓ Golgi bodies
7➤ In hospitals plants are removed from patient's room at night because:
ⓑ They produce CO2 at night
ⓒ They produce CO₂ all the 24 hours, but give out oxygen during day
ⓓ This practice significance has no- practical
8➤ When the bread is baked, it becomes light and spongy, because:
ⓑ The evolution of CO₂ from the kneaded flour
ⓒ The presence of yeast
ⓓ None of above
9➤ Food products are kept under refrigeration or in cold storage because:
ⓑ Respiration is negligible under very low temperature and the food products
ⓒ Foodstuff becomes tasty
ⓓ They can be used in off-season
10➤ Respiration and photosynthesis, both require:
ⓑ Cytochrome
ⓒ Sunlight
ⓓ Energy from carbon bonds
11➤ Which of the following statements about NAD+ is false?
ⓑ NAD+ is reduced by the action of dehydrogenases
ⓒ NAD+ has more chemical energy than NADH
ⓓ NAD+ can receive electrons for use in oxidative phosphorylation
12➤ The colour of cytochrome is:
ⓑ Black
ⓒ Pink
ⓓ Colourless
13➤ One stearic acid molecule releases:
ⓑ 147 ATP
ⓒ 145 ATP
ⓓ 180 ATP
14➤ Krebs cycle is a:
ⓑ Anabolic cycle
ⓒ Amphoteric cycle
ⓓ Amphibolic cycle
15➤ Electron acceptor in cyt a3
ⓑ Cu
ⓒ As
ⓓ Both (a) & (b)
16➤ Orobanche plant is:
ⓑ Magnesium
ⓒ Nitrogen
ⓓ Water
17➤ Insectivorous plants kill insects because:
ⓑ Insects eat their fruits
ⓒ They are heterotrophs
ⓓ They oVitain nitrogen from to1 led insects
18➤ Insectivorous plants grow in soil which is deficient in:
ⓑ Magnesium
ⓒ Nitrogen
ⓓ Water
19➤ A pair of insectivorous plants is:
ⓑ Nepenthes and bladderwort
ⓒ Dionaca and Viscum
ⓓ Venus fly trap and Refflesia
20➤ Insectivorous plant is:
ⓑ Crotolaria
ⓒ Eichhornia
ⓓ Utricularia
21➤ The mass flow described by: hypothesis was first
ⓑ Buchanan
ⓒ Kurosawa
ⓓ Munch
22➤ Which would do maximum harm to a tree?
ⓑ The loss of all its leaves
ⓒ The loss of half its branches
ⓓ The loss of its bark
23➤ Organic substances such as sugars are translocated in the phloem can be demonstrated by:
ⓑ Root pressure
ⓒ Defoliation
ⓓ Ringing the stem
24➤ Photosyntha'.s are transported to other part of higher plants through:
ⓑ Pith cells
ⓒ Xylem cells
ⓓ Phloem cells
25➤ Translocation of sugar in flowering plants occurs in the form of:
ⓑ Sucrose
ⓒ Starch
ⓓ Maltose
26➤ Rubisco (RuBP-carboxylase oxygenase), a protein which comprises:
ⓑ 11% of total chloroplast portion
ⓒ 16% of total chloroplast portion
ⓓ 20% of total chloroplast portion
27➤ Photo-oxidation refers to:
ⓑ Photorespiration
ⓒ Light induced breakdown. of substance in the nresence of oxygen
ⓓ All of above
28➤ Action spectrum of photosynthesis in 1883 was described by:
ⓑ Hill
ⓒ Amon
ⓓ Englemann
29➤ The electron energy transfer between accessory pigments and chlorophyll molecules takes place by:
ⓑ Radiation
ⓒ Resonance
ⓓ Flourescence
30➤ The two enzymes responsible for primary carboxylation in C3 and C4 plants, respectively are:
ⓑ PEP carboxylase and RuBP carboxylase
ⓒ PEP carboxylase and pyruvate carboxylase
ⓓ RuBP carboxylase and PEP carboxylase
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