Search results
Feb 5, 2018 · The main difference between vector and carrier is that a vector does not show any symptoms of the disease whereas a carrier is an infected organism capable of transmitting the disease-causing microorganisms to a healthy individual. Anopheles mosquito that carries malaria parasites between humans is an example of a vector.
Sep 30, 2022 · Biology definition: A biological vector is an organism that transmits the causative agent or disease -causing organism from the reservoir to the host. It may also refer to a reproductive agent, dispersing reproductive structures, such as a bee that serves as a vector in transmitting pollen to the stigma of a flower.
Jul 25, 2016 · The classical features of an individual said to be a carrier of Streptococcus pyogenes (Group A streptococcus) is the confirmed presence of the organism in their posterior pharynx, without any of the usual attendant clinical symptoms of acute pharyngitis. This chapter provides an overview and discussion of relevant topics of S. pyogenes carriage, including its prevalence, longitudinal studies ...
Bacterial carrier matrix provides large surface area and higher catalytic reactivity between metal ion and the enzyme thus enabling the rapid production of nanoparticles. Almost all the bacterial species adopt the common mechanism of synthesis of reductases enzymes for bio reduction of the metal ions.
May 24, 2023 · Antigen (definition in biology): any of the various substances that when recognized as non-self by the immune system will trigger an immune response. Examples: allergens, blood group antigens, HLA, substances on the surface of foreign cells, toxins. Related forms: antigenic (adjective), meaning “of, pertaining to, or relating to an antigen”.
Aug 3, 2023 · Active transport is the energy-driven transportation of ions, small molecules, and solutes across the biological membrane against an electrochemical gradient (for ions) or concentration gradient i.e., from lower to higher concentration. Since this mode of cellular transportation requires energy, a significant amount of cellular energy is spent ...
Oct 14, 2023 · The chloroplast, a vital organelle responsible for photosynthesis in plant cells, exhibits a complex and highly organized structure composed of three main components: Envelope: The chloroplast is enveloped by a double membrane structure, consisting of an outer and inner lipid bilayer.
