Nitrogen Fixation exam Flashcards

The process by which bacteria convert atmospheric nitrogen (N2) into ammonia (NH3), making it usable for plants.

Nitrogen is a required element in both nucleic acids and proteins.

A form of nitrogen absorbed by plants, derived from ammonia.

Approximately 78%.

Another form of nitrogen absorbed by plants, produced through various chemical reactions.

Gram-negative soil bacteria that perform nitrogen fixation in the roots of legumes.

Mycorrhizae are symbiotic fungi that enhance nutrient absorption, including nitrogen, for plants.

A molecule produced by legumes to bind oxygen and protect nitrogenase from oxygen poisoning.

16 ATP and 8 high-energy electrons.

The enzyme complex that facilitates the conversion of gaseous nitrogen (N2) into ammonia (NH3).

Swollen nodes where rhizobia bacteria infect the plant roots to perform nitrogen fixation.

Plants that supplement their nitrogen intake by consuming animals.

A chemical cycle in which nitrogen is converted through various forms, making it available to living organisms.

A type of mycorrhizae where fungal hyphae wrap around plant cells but do not penetrate them.

Decomposers break down organic matter, releasing ammonium and other forms of nitrogen into the soil.

A type of mycorrhizae where fungal hyphae penetrate the cortical cells of plant roots.

Chemicals released by plant roots to attract rhizobia bacteria.

Organisms, usually fungi or bacteria, that live inside other plants.

Rhizobia provide usable nitrogen to plants in exchange for carbohydrates and protection.

The process by which nitrogen is converted between its various chemical forms, involving processes like nitrogen fixation and decomposition.

Nitrogen gas (N2).

Organisms that break down dead organic matter, contributing to the nitrogen content in the soil.

Nitrogen is a key component of nucleotides, the building blocks of DNA and RNA.

A mutually beneficial relationship between two different organisms, such as plants and rhizobia.

Epiphytes absorb water and nutrients, including nitrogen, from the air, rain, and debris around them.

A multi-enzyme complex that reduces gaseous nitrogen (N2) to ammonia (NH3) during nitrogen fixation.

Signals released by rhizobia bacteria to stimulate root hair changes, allowing bacterial entry into the plant.

A type of symbiotic relationship where both organisms benefit, such as plants and nitrogen-fixing bacteria.