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Doctors Medicines MCQs Q&A

Which one of the following elements is considered as a 'micronutrient' in plants?

Which one of the following elements is considered as a 'micronutrient' in plants? Correct Answer Zn

The correct answer is Zn.

Key Points

  • Only a few elements have been found to be absolutely essential for plant growth and metabolism.
  • These elements are further divided into two broad categories based on their quantitative requirements: (i) Macronutrients, and (ii) Micronutrients.
  • Macronutrients are generally present in plant tissues in large amounts.
    • The macronutrients include carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorous (P), sulphur (S), potassium (K), calcium (Ca) and magnesium (Mg).
    • Of these, carbon, hydrogen and oxygen are mainly obtained from CO2 and H2O, while the others are absorbed from the soil as mineral nutrition.
  • Micronutrients or trace elements are needed in very small amounts.
    • These include iron, manganese (Mn), copper (Cu), molybdenum (Mo), zinc (Zn), boron (B), chlorine (Cl) and nickel (Ni).

Additional Information

  • In addition to the 17 essential elements named above, there are some beneficial elements such as sodium (Na), silicon (Si), cobalt (Co) and selenium (Se). They are required by higher plants

Related Questions

The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options.   P: The incidence and severity of Type B malnutrition will be shown to be worse if newer micronutrient groups such as the essential fatty acids, xanthophylls and flavonoids are included in the surveys. Q: Commonly ingested levels of these micronutrients seem to be far too low in many developed countries. R: Many national surveys reveal that malnutrition is common in developed countries. S: This is not the calorie and/or micronutrient deficiency associated with developing nations (Type A malnutrition); but multiple micronutrient depletion, usually combined with calorific balance or excess (Type B malnutrition).
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the mostlogical order of sentences from among the options.
P: The incidence and severity of Type B malnutrition will be shown to be worse if newer micronutrient groups such as the essential fatty acids, xanthophylls and flavonoids are included in the surveys.
Q: Commonly ingested levels of these micronutrients seem to be far too low in many developed countries.
R: Many national surveys reveal that malnutrition is common in developed countries.
S: This is not the calorie and/or micronutrient deficiency associated with developing nations (Type A malnutrition); but multiple micronutrient depletion, usually combined with calorific balance or excess (Type B malnutrition).
Consider the following two C code segment. Y and X are one- and two-dimensional arrays of size n and n × n respectively, where 2 ≤ n ≤ 10. Assume that in both code segments, elements of y are initialized to 0 and each element X[i] [j] of array X is initialized to i + j. Further assume that when stored in main memory all elements of x are in same main memory page frame. Code segment 1:                 //initialize elements of y to 0                 //initialize elements X[i] [j] of X to i+j                       for (i = 0; i < n; i++)                                 Y[i] += X[0] [i]; Code Segment 2:                 //initialize elements of Y to 0                 //initialize elements X[i] [j] of X to i+j                        for (i = 0; i < n; i++)                                 Y[i] += X[i] [0]; Which of the following statements is/are correct? S1: Final contents of array Y will be same in both code segments S2: Elements of array X accessed inside the for loop shown in code segment 1 are contiguous in main memory S3: Elements of array X accessed inside the for loop shown in code segment 2 are contiguous in main memory
Consider the following statements and choose the correct answer:
1. Intense or strong light retards the growth of shoot
2. Shade plants are shorter and stockier than sun plants
3. Shade plants have dense covering of hairs while sun plants are less hairy
4. The stems of shade plants are taIler and more branched than that of sun plants
In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
The "Global Nutrition Report 2016" once again ____________ India's slow overall progress ____________ addressing chronic malnutrition, manifest in stunting (low weight for age), wasting (low weight for height), micronutrient __________ and over­weight. Our track _________ in reducing the proportion of undernourished children over the past decade has been modest at best, and _____________ what other countries with comparable socio­economic indicators have achieved.
micronutrient __________ and over­weight.
Consider the following statements and choose the correct answer:
1. The C4 plants can absorb CO2 even from a much low CO2 concentration when the C3 plants fail to avail it
2. The C4 plants require less energy to fix CO2 as compared to C3 plants
3. C4 plants are better adapted to tropical and desert areas where sunlight is more intense and the growing season is longer
4. Maize is a C4 plant
Plants have been used as healers and health rejuvenators since times immemorial. More than half the drugs under clinical use owe their origin to plants. The Glossary of Indian Medicinal Plants lists 3000 plants. Which part of the plants is used most for medicinal properties ? 
S1:Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years.
P :Records of the history of the world are contained in fossils.
Q :Through the ages, plants have evolved from simple to more complex forms.
R :First there were water plants then land plants appeared during the Paleozoic era.
S :But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation.
S6:The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography.

The Proper sequence should be:
Which of the following elements is NOT a micronutrient in plants?
Which of the following elements is the Micronutrient supplements in plants?