Tag: nutrients and nutrition

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Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Match List-I(mode of nutrition in bacteria) with List-II(examples of bacteria) and select the correct answer.

List-I List-II
a. Photoautotroph $1$. Escherichia coli
b. Chemoautotroph $2$. Rhodospirillum rubrum
c. Photocheterotroph $3$. Chlorobium sp.
d. Chemoheterotroph $4$. Nitrosomonas sp.
  1. A-$4$, B-$3$, C-$2$, D-$1$
  2. A-$3$, B-$4$, C-$1$, D-$2$
  3. A-$3$, B-$4$, C-$2$, D-$1$
  4. A-$4$, B-$3$, C-$1$, D-$2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photoautotrophs like Chlorobium use light (3), Chemoautotrophs like Nitrosomonas use chemical energy (4), Photoheterotrophs like Rhodospirillum use light and organic compounds (2), and Chemoheterotrophs like E. coli use organic compounds (1).

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Match List I (nutrient) with List II(deficiency symptom in leaf) and select the correct answer using the codes given the lists.

List-I List-II
a. Phosphorus $1$. Lower leaves yellow between veins; purplish color of petiole
b. Potassium $2$. Discoloration of leaf, starting from margins and extending towards mid-rib
c. Manganese $3$. Dead tissues around the margins and in between the veins of the leaves
d. Calcium $4$. Development of chlorosis in patches in dicots and in stripes in monocots
  1. A-$1$, B-$2$, C-$3$, D-$4$
  2. A-$2$, B-$1$, C-$3$, D-$4$
  3. A-$1$, B-$2$, C-$4$, D-$3$
  4. A-$2$, B-$1$, C-$4$, D-$3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

The mineral nutrient mainly concerning with apical meristematic activity is _________.

  1. K

  2. Ca

  3. N

  4. S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Potassium (K) is essential for various physiological processes, including the activation of enzymes and the maintenance of turgor pressure, which is critical for cell division and apical meristematic activity.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Hydroponics or soilless culture helps in knowing _______________.

  1. Essentiality of an element

  2. Deficiency symptoms caused by an element

  3. Toxicity caused by an element

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics or soilless culture helps to know the essentiality of mineral elements, deficiency symptoms developed due to non-availability of particular nutrient, toxicity to plant when element is present in excess, possible interaction among different elements present in plants and role of essential element in the metabolism of plant.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

The technique of growing plants in a nutrient solution, in complete absence of soil is called as ___________.

  1. Aeroponics

  2. Water culture

  3. Hydroponics

  4. Soil culture
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cultivation of plants by placing the roots in the nutrient solution (in complete absence of soil) is called hydroponics. It is necessary to aerate the solution to provide roots with adequate oxygen supply. The result obtained from soil-less culture may then be used to determine deficiencies under field conditions.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Micronutrients are present in plant tissues in concentrations less than _______ of dry matter.

  1. 1 m mole $Kg^{-1}$
  2. 10 m mole $Kg^{-1}$
  3. 0.1 m mole $Kg^{-1}$
  4. 2 m mole $Kg^{-1}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micronutrients are defined as essential elements required in small quantities, specifically less than 10 millimoles per kilogram of dry matter.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Choose the correct answer from the alternatives given.
Heart rot of beet root is caused by the deficiency of:

  1. B

  2. Fe

  3. Mg

  4. Zn
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heart rot in beet root is a deficiency in the minor, nonmobile element Boron, $B$. It shows necrotic cross-hatching inside the leaf petiole. Young leaves turn brown and die, resulting in a rosette of small dead leaves at the top of the beet. In the fleshy root, internal and external black spots of necrotic tissue develop.

So the correct answer is "$B$".

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Choose the correct answer from the alternatives given.
Phosphorus deficiency in plants causes.

  1. premature leaf fall

  2. purple anthocyanin pigmentation

  3. older leaves exhibit deficiency symptoms first

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phosphorus deficiency is a plant disorder associated with an insufficient supply of phosphorus. Darker green leaves and purplish or red pigment can indicate a deficiency in phosphorus. It is most common in lower leaves that are older. This condition is associated with the accumulation of sugars in P-deficient plants. Stems are thinner and leave acquire a leathery texture and tend to curl upwards, sometimes shedding prematurely. 

So the correct answer is "all of the above".