Plant Biology and Biochemistry

The exine (outer wall) of a pollen grain is composed of sporopollenin, which is highly resistant to degradation.

Oxalis and Viola are classic examples of plants that produce both chasmogamous and cleistogamous flowers.

A false fruit (pseudocarp) is one where parts other than the ovary, such as the thalamus, contribute to the fruit formation.

EMP pathway is the standard name for glycolysis, named after the scientists Gustav Embden, Otto Meyerhof, and Jakub Karol Parnas.

DNA is used to synthesize DNA (replication), mRNA (transcription), and indirectly tRNA, but it does not directly synthesize protein molecules (which requires ribosomes and translation).

In grasses, the awn is an extension of the midrib of the lemma.

Photolysis of water occurs at the oxygen-evolving complex associated with Photosystem II. Without PSII, this process cannot occur.

The chlorophyll molecule has a head-and-tail structure, where the porphyrin head is often described as kite-shaped or square-like in diagrams.

The Krebs cycle begins with the condensation of acetyl-CoA with oxaloacetate to form citric acid.

Sorghum, like other grasses (Poaceae), has a single ovule at the base of the ovary, which is characteristic of basal placentation.

Bryophytes are called the amphibians of the plant kingdom because they require water for fertilization, similar to how amphibians require water for their life cycle.

Heterospory is defined as the production of two different types of spores, specifically microspores (small) and megaspores (large).

 Pollen kit is present in the pollens of entomophilous flowers.

The aleurone layer in maize grains is a specialized layer of cells rich in proteins, which are used during germination.

In Hibiscus (Malvaceae), the filaments of the stamens fuse to form a staminal tube that surrounds the style and the ovary.

Ribosomes are ribonucleoprotein complexes consisting primarily of ribosomal RNA (rRNA) and ribosomal proteins. They are the site of protein synthesis in the cell.

Plant introduction is the process of bringing a plant species or variety into a new geographical area where it was previously not grown. This is a common method in agricultural breeding to expand crop diversity.

Energy plantations are specifically established to produce biomass for fuel wood or energy generation. Energy cropping is a broader term that may refer to various crops grown for energy purposes, but the defining characteristic of an energy plantation is the focus on wood production.

Bacillus thuringiensis (Bt) is a soil bacterium that produces proteins toxic to certain insect larvae, including the gypsy moth. It is widely used as a biological control agent in agriculture and forestry.

Chrysanthemum flowers contain pyrethrins, which are natural compounds with potent insecticidal properties. These are extracted and used in various commercial insecticide formulations.

Transposons, often called jumping genes, are DNA sequences that can change their position within a genome. They were first discovered by Barbara McClintock in maize.

The inner mitochondrial membrane contains F0-F1 particles, also known as oxysomes or ATP synthase complexes. These structures are essential for oxidative phosphorylation and ATP production.

Magnesium is the central atom of the chlorophyll molecule, while nitrogen is a key component of the porphyrin ring structure. Both are essential for the synthesis of chlorophyll.

Unlike oxygenic photosynthesis in plants, bacterial photosynthesis (such as in green and purple sulfur bacteria) uses hydrogen sulfide (H2S) as an electron donor instead of water.

Correct Answer: Soybean