MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Biology MCQ
Neet Botany Mineral Nutrition Mcq
Quiz 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
Phytotron is meant for ... .... [ AIIMS 1998]
0%
a) Controlled irradiation
0%
b) Induction of mutations
0%
c) Controlled humidity
0%
d) Growing plants under controlled environment
Explanation
Answer : (d)
Q.2
Leghaemoglobin is formed for ... ... [ AIIMS 2012]
0%
a) Respiration
0%
b) Photosynthesis
0%
c) Nitrogen fixation
0%
d) Fatty acid synthesis
Explanation
Answer : (c)
Q.3
Choose in correct pair.
0%
a) Pulses - Nostoc
0%
b) Nitrogenase - iron & molybdenum containing protein.
0%
c) leghemoglobin - Oxygen carries protein.
0%
d) FAD - Floride Adenine Dinucleotide.
Explanation
Answer:(c)
Q.4
Pungent principle, sinigrin, of crucifers is a ... ..... [ BHU 1994]
0%
a) Glycoside having sulphur
0%
b) Glycoside having cyanide
0%
c) Glycoside having special amino acids
0%
d) Tannin
Explanation
Answer : (a)
Q.5
Match the following concerning essential elements and their functions in plants ... [NEET 2020] Select the correct option
(a) Iron
(i) Photolysis of water
(b) Zinc
(ii) Pollen germination
(c) Boron
(iii) Required for chlorophyll biosynthesis
(d) Manganese
(iv) IAA biosynthesis
0%
a) a → iii; b → iv; c → ii; d → i;
0%
b) a → iv; b → i; c → ii; d → iii;
0%
c) a → ii; b → i; c → iv; d → iii;
0%
d) a → iii; b → iii; c → ii; d → i;
Explanation
Plants obtain iron in the form of ferric ions (Fe3+). It is reversibly oxidised from Fe2+ to Fe3+ during electron transfer. It activates catalase enzyme, and is essential for the formation of chlorophyll. a → iii Plants obtain zinc as Zn2+ ions. It activates various enzymes, especially carboxylases. It is also needed in the synthesis of auxin (IAA). b → iv Boron is absorbed as BO33- or B4 O72-. Boron is required for uptake and utilisation of Ca2+, membrane functioning, pollen germination, cell elongation, cell differentiation and carbohydrate translocation. c → ii The best defined function of manganese is in the splitting of water to liberate oxygen during photosynthesis d → i Answer : (a)
Q.6
Which of the following elements is responsible for maintaining turgor in cells ? [NEET 2018]
0%
a) Potassium
0%
b) Sodium
0%
c) Magnesium
0%
d) Calcium
Explanation
Answer:(a)
Q.7
In which of the following forms is iron absorbed by plants ? [NEET 2018]
0%
a) Free element
0%
b) Ferrous
0%
c) Ferric
0%
d) Both ferric and ferrous
Explanation
Answer : (c)
Q.8
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
0%
a) Ammonia and oxygen
0%
b) Ammonia and hydrogen
0%
c) Ammonia alone
0%
d) Nitrate alone
Explanation
Answer : (b)
Q.9
Essential macronutrients are ... ..... [ MPPMT 1993]
0%
a) Manufactured during photosynthesis
0%
b) Produced by growth hormones
0%
c) Absorbed from soil
0%
d) Produced by enzymes
Explanation
At least 17 elements are known to be essential nutrients for plants. In relatively large amounts, the soil supplies nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur; these are often called the macronutrients. ... Carbon and oxygen are absorbed from the air while other nutrients are absorbed from the soil. Answer : (c)
Q.10
Gene responsible for nitrogen fixation is ... ... [ Pb. PMT 2005]
0%
a) Nif
0%
b) Nitrogenase
0%
c) Yeast alanine tRNA synthetase
0%
d) RNA synthetase
Explanation
The nif genes are genes encoding enzymes involved in the fixation of atmospheric nitrogen. The primary enzyme encoded by the nif genes is the nitrogenase complex which is in charge of converting atmospheric nitrogen to other nitrogen forms such as ammonia, which plants can use for various purposes Answer : (a)
Q.11
An essential element is that which ... .... [ MPPMT 1990]
0%
a) Is found in plant ash
0%
b) Is available in soil
0%
c) Improves health of plants
0%
d) Is irreplaceable and indispensable for growth of plants
Explanation
A mineral element is considered essential to plant growth and development if the element is involved in plant metabolic functions and the plant cannot complete its life cycle without the element. Answer : (d)
Q.12
Denitrification is carried out by .... ..... [ JKCET 2012]
0%
a) Nitrosomonas
0%
b) Nitrosococcus
0%
c) Nitrobacter
0%
d) Pseudomonas
Explanation
Denitrification is the name of the biochemical process whereby bacteria in soil converts nitrates (through several steps) into nitrogen gas and nitrous oxide. Pseudomonas, and Achromobacter are implicated as denitrifiers. Pseudomonas aeruginosa can, under anaerobic conditions (as in swampy or water-logged soils), reduce the amount of fixed nitrogen (as fertilizer) by up to 50 percent Answer : (d)
Q.13
Plants absorb nitrogen as ... ... [ CMC 2002]
0%
a) Nitrate
0%
b) Nitrite
0%
c) Ammonia and Urea
0%
d) All the above
Explanation
Plants take nitrogen from the soil by absorption through their roots as amino acids, nitrate ions, nitrite ions, or ammonium ions. Answer:(d)
Q.14
Function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to .... ..... [ AIIMS 2006]
0%
a) Convert atmospheric nitrogen to ammonia
0%
b) Convert ammonia to nitrite
0%
c) Transport oxygen for activity of nitrogenase
0%
d) Protect nitrogenase from oxygen
Explanation
Leghaemoglobin is found in the nodules of leguminous plants. The main functions of leghemoglobin are (1) to facilitate oxygen supply to the nitrogen fixing bacteria and (2) to protect the enzyme, nitrogenase from being inactivated by oxygen. Answer : (d)
Q.15
Major role of minor elements inside living organisms is to act as ... ...[ CBSE 2003]
0%
a) Binder of cell structure
0%
b) Constituent of hormones
0%
c) Building blocks of important amino acids
0%
d) Cofactor of enzymes
Explanation
Answer:(d)
Q.16
Active transport occurs ... .... [ BHU 2000 ]
0%
a) Against concentration gradient and requires ATP
0%
b) Against concentration gradient but does not require ATP
0%
c) Along concentration gradient but requires ATP
0%
d) Along concentration gradient but does not require ATP
Explanation
Active transport mechanisms require the use of the cell's energy, usually in the form of adenosine triphosphate (ATP). Active transport is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentration Answer : (a)
Q.17
In the given diagram A and B represent ... ..[AIIMS 2011]
0%
a) Mineralisation, Demineralization
0%
b) Ammonification, Denitrification
0%
c) Denitrification, Ammonification
0%
d) Denitrification, Mineralisation
Explanation
Denitrification is the name of the biochemical process whereby bacteria in soil converts nitrates (through several steps) into nitrogen gas and nitrous oxide. Ammonification: This is a process where bacteria or other decomposers break down nitrogen-containing chemicals from waste or a dead body into simpler chemicals, such as ammonia. Answer : (c)
Q.18
Element which is a component of proteinaceous materials and protoplasm is ... ... [ AMU 1996]
0%
a) Potassium
0%
b) Oxygen
0%
c) Magnesium
0%
d) Chlorine
Explanation
99% of protoplasm is made of 4 basic elements, i.e., oxygen, carbon, hydrogen and nitrogen Therefore; these are called major constituents of the protoplasm. 8 other elements (trace elements), present in quantities of less than 1% each, are sulphur, phosphorus, potassium, iron, magnesium, calcium, sodium and chloride Proteins are made up of smaller building blocks called amino acids, have Carbon, Oxygen Nitrogen Hydrogen Answer : (b)
Q.19
Minerals are absorbed in the form of ... ...[ RPMT 1996]
0%
a) Molecules
0%
b) Ions
0%
c) Compounds
0%
d) Mixtures
Explanation
Mineral ions cross plasma membranes by a chemiosmotic mechanism. Plants absorb minerals in ionic form: nitrate (NO3−), phosphate (HPO4−) and potassium ions (K+); all have difficulty crossing a charged plasma membrane. Answer : (b)
Q.20
Active and passive transports across cell membrane differ in ... .... [ CBSE 1993]
0%
a) Passive transport in non-selective
0%
b) Passive transport is along the concentration gradient while active transport is due to metabolic energy
0%
c) Active transport is more rapid
0%
d) Passive transport is confined to anions while active transport in confined to cations
Explanation
Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration against the concentration gradient. Uses ATP energy “Passive transport is the movement of molecules across the membrane without the help of energy. Answer : (b)
Q.21
Assertion: Nitrogen fixing bacteria of legume root nodules survive in oxygen depleted cells. Reason: Leghaemoglobin completely removes oxygen from nodule cells. ... .... [ AIIMS 2004]
0%
a) If both the assertion and reason are true and reason explains the assertion.
0%
b) If both the assertion and reason are true but reason does not explain the assertion
0%
c) If assertion is true but reason is false
0%
d) If assertion is false but reason is true.
Explanation
Assertion is correct because: Symbiotic nitrogen fixation occurs in legume plants. It takes place in the Rhizobium bacteroids which are located within root nodules cells. The important enzyme Nitrogenase (synthesised by Rhizobium) that reduces N2, is oxygen sensitive. lt can only function at low oxygen concentration Reason is not correct because: Its function is to help provide oxygen to the respiring symbiotic bacterial cells. Answer : (c)
Q.22
Plant ash indicates ... ..... [ CPMT 2004]
0%
a) Organic matter of plant
0%
b) Mineral salt absorbed by plants
0%
c) Both mineral salts and organic matter
0%
d) Silica absorbed by plants
Explanation
Analysis of plant ash shows that about 92 mineral elements are present in different plants Answer : (b)
Q.23
Nitrifying bacteria convert ... .... [ MPPMT 2007]
0%
a) Nitrate to nitrogen
0%
b) Ammonia to nitrogen
0%
c) Nitrogen into soluble form
0%
d) Ammonia to nitrate
Explanation
Nitrifying bacteria include ammonia-oxidizing bacteria and nitrite-oxidizing bacteria Nitrifying bacteria in the soil convert ammonia into nitrite (NO2-) and then into nitrate (NO3-). This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins. Nitrifying bacteria are chemolithotrophic organisms that include species of the genera Nitrosomonas, Nitrosococcus, Nitrobacter and Nitrococcus. These bacteria get their energy by the oxidation of inorganic nitrogen compounds. Answer : (d)
Q.24
The enzymes required for nitrogen fixation is .... ... [ kerala 2007]
0%
a) Nitrogen deaminase
0%
b) Nitrodioxidase
0%
c) Amino acid decarboxylase
0%
d) Nitrogenase
Explanation
Nitrogenase is an enzyme responsible for catalyzing nitrogen fixation, which is the reduction of nitrogen (N2) to ammonia (NH3) and a process vital to sustaining life on Earth Answer : (d)
Q.25
Which group of three micronutrient elements affect both photosynthetic and mitochondrial electron transport? ... ... [ CBSE 2005]
0%
a) Cu, Mn, Fe
0%
b) Co, Ni, Mo
0%
c) Ca, K, Na
0%
d) Mn, Co, Ca
Explanation
Cu (copper), Mn (manganese) and Fe (Iron) are those micronutrients which affect both photosynthesis and mitochondrial electron transport because they are the main constituents of various electron carriers. Answer : (a)
Q.26
Inorganic nutrients are present in the soil as ... ...[ MPPMT 1999 ]
0%
a) Molecules
0%
b) Atoms
0%
c) Electrically charged ions
0%
d) Colloids
Explanation
Inorganic nutrients are present in the soil as Electrically charged ions Cations in Soil : Potassium, Ammonium,Magnesium, Calcium ,Manganese ,Zinc,Hydrogen Anions in Soil Nitrate Sulfate Phosphate Chloride Borate Molybdate Answer : (c)
Q.27
Yield of Rice increase by .... ... [ BHU 2012]
0%
a) Sesbania
0%
b) Anabaena
0%
c) Bacillus subtilis
0%
d) B. popilliae
Explanation
Biological nitrogen fixation through Azolla Anabaena complex is a potential biological system for increasing rice yields, at comparatively low cost. Azolla possesses the desired qualities of a green manure crop, like quick growth, large biomass production, higher nitrogen content and easy decomposability in the soil. Answer : (b)
Q.28
Which one is not a micronutrient? ... ... [ RPMT 1995]
0%
a) Mo
0%
b) B
0%
c) Mg
0%
d) Zn
Explanation
Micronutrients: boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn). The macronutrients include: Carbon (C), Hydrogen (H), Oxygen (O),Nitrogen (N),Phosphorus (P),Potassium (K),Calcium (Ca),Magnesium (Mg),Sulfur (S) Answer : (c)
Q.29
Bacteria that convert ammonia to nitrite belong to ... ... [ HPPMT 2007]
0%
a) Nitrobacter
0%
b) Nitrosomonas
0%
c) Pseudomonas
0%
d) Mycobacterium
Explanation
Nitrosomonas is a genus of Gram-negative rod-shaped chemoautotrophic bacteria. This organism oxidizes ammonia into nitrite as a metabolic process, known as nitritation Answer : (b)
Q.30
Brown heart disease is due to deficiency of ... ... [ AIIMS 1992]
0%
a) Iron
0%
b) Boron
0%
c) Potassium
0%
d) Molybdenum
Explanation
boron deficiency can cause root crops, especially rutabaga, to develop soft brown centers, a disorder called “brown heart” Answer : (b)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page