Virus Movement and Plant Physiology Quiz

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Triple gene block (TGB) is a group of three viral genes: TGR1, TGR2, and TGR3. These genes are involved in the movement of viruses within plants.

Potyviruses are a type I virus for movement. They use a different mechanism for movement than type II viruses.

Apical meristems are the growing points of plants, where new cells are produced. Viruses can be present in other parts of the plant, but they don't usually directly enter the apical meristem.

Viral infections often disrupt plant processes, including transpiration. This can lead to reduced water movement through the plant.

Viral infections can impact the host cell's ability to produce proteins. However, it doesn't necessarily mean a complete reduction in transcription and translation.

Viruses can use both major and minor veins for transport within plants. This depends on the plant species and the type of virus.

Chloroplast numbers can decrease in virus-infected plants due to the disruption of cellular processes.

Hypersensitive hosts have a rapid defense response to pathogens, leading to increased respiration for energy production. This is more evident than in nonhypersensitive hosts.

Viruses can travel throughout a plant through vascular tissues. They don't directly move from the infection site to the root.

Viral movement within a cell relies on the cell's internal structures like the endoplasmic reticulum and cytoskeleton for transport.

Plasmodesmata are tiny channels that connect the cytoplasm of adjacent plant cells, allowing for communication and movement of substances.

Movement proteins are essential for the movement of viruses through plasmodesmata. They help in the widening of these channels.

Movement proteins have various functions, including binding to either ssRNA or ssDNA, which are types of genetic material.

Type II movement proteins are found in hordeiviruses and potexviruses. There are other types of movement proteins with different roles.

Systemic spread of a virus involves the movement of the virus from infected leaves to other parts of the plant, including the root.