Plant Physiology Biochemistry

Step 1: Understanding the Concept:
The question asks to arrange the given intermediate compounds in the correct sequence as they appear in the Tricarboxylic Acid (TCA) cycle, also known as the Krebs cycle or citric acid cycle.

Step 2: Detailed Explanation:
The TCA cycle is a series of chemical reactions used by all aerobic organisms to release stored energy. The sequence involving the given compounds is as follows:
$%5Cbegin%7Barray%7D%7Brl%7D%201.%20%26%20%5Ctext%7BThe%20cycle%20begins%20when%20Acetyl-CoA%20combines%20with%20Oxaloacetate%20to%20form%20(B)%20Citric%20Acid.%7D%20%5C%5C%202.%20%26%20%5Ctext%7BCitric%20acid%20is%20then%20isomerized%20into%20its%20isomer%2C%20(A)%20Isocitric%20Acid.%7D%20%5C%5C%203.%20%26%20%5Ctext%7BIsocitric%20acid%20is%20then%20oxidized%20and%20decarboxylated%2C%20leading%20to%20a%20series%20of%20other%20intermediates%20(alpha-ketoglutarate%2C%20succinyl-CoA%2C%20succinate).%7D%20%5C%5C%204.%20%26%20%5Ctext%7BSuccinate%20is%20oxidized%20to%20form%20(C)%20Fumaric%20Acid.%7D%20%5C%5C%205.%20%26%20%5Ctext%7BFumaric%20acid%20is%20then%20hydrated%20to%20form%20(D)%20Malic%20Acid.%7D%20%5C%5C%206.%20%26%20%5Ctext%7BFinally%2C%20Malic%20acid%20is%20oxidized%20back%20to%20Oxaloacetate%2C%20allowing%20the%20cycle%20to%20begin%20again.%7D%20%5C%5C%20%5Cend%7Barray%7D$

Therefore, the correct chronological order for the given molecules is Citric Acid $%5Crightarrow$ Isocitric Acid $%5Crightarrow$ Fumaric Acid $%5Crightarrow$ Malic Acid.

Step 3: Final Answer:
The correct order of occurrence in the TCA cycle is (B), (A), (C), (D).

Step 1: Understanding the Concept:
The question asks to identify the specific biochemical compound responsible for the characteristic bitter taste of bitter gourd (*Momordica charantia*).

Step 2: Detailed Explanation:
Let's look at the given options:
$%5Cbegin%7Barray%7D%7Brl%7D%20%5Cbullet%20%26%20%5Ctext%7B1.%20Betain%3A%20A%20compound%20found%20in%20beets%2C%20contributing%20to%20their%20earthy%20flavor.%20%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B2.%20Melanin%3A%20A%20pigment%20responsible%20for%20coloration%20in%20skin%2C%20hair%2C%20and%20eyes%3B%20not%20a%20flavor%20compound.%20%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B3.%20Cucurbitacin%3A%20This%20is%20a%20class%20of%20triterpenoid%20compounds%20that%20are%20known%20for%20their%20intensely%20bitter%20taste.%20They%20are%20found%20in%20many%20plants%20of%20the%20gourd%20family%20(Cucurbitaceae)%2C%20including%20bitter%20gourd%2C%20cucumbers%2C%20and%20squashes.%20The%20specific%20cucurbitacins%20in%20bitter%20gourd%20are%20the%20primary%20source%20of%20its%20bitterness%20and%20are%20also%20studied%20for%20their%20medicinal%20properties.%20%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B4.%20Bromelain%3A%20A%20protein-digesting%20enzyme%20complex%20found%20in%20pineapple.%20%7D%20%5C%5C%20%5Cend%7Barray%7D$ Therefore, the bitterness in bitter gourd is due to cucurbitacins.

Step 3: Final Answer:
The bitter component in *Momordica charantia* is Cucurbitacin.

High-Yield Trend

Chapter Questions
2 MCQs

Official Solution

Official Solution

Plant Physiology Biochemistry

High-Yield Trend

Chapter Questions 2 MCQs

Official Solution

Official Solution

Chapter Questions
2 MCQs