Viruses do not contain enzymes. Unlike other living organisms such as algae, lichen, and bacteria, viruses lack cellular machinery and cannot carry out metabolic processes on their own. They rely on host cells for replication and metabolism.
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Viruses are considered to be a transitional group between living and non-living. They exhibit properties of life, such as replication, only when inside a host cell, but are inert and lack cellular structure outside of a host.
Ivanovsky discovered the virus first. Dmitri Ivanovsky, a Russian biologist, discovered the tobacco mosaic virus in 1892 while investigating a disease affecting tobacco plants. He found that the infectious agent could pass through filters that trapped bacteria, leading to the ...
Rhizobium is a symbiotic nitrogen-fixing bacterium. It forms a mutualistic relationship with leguminous plants, inhabiting their root nodules. In exchange for nutrients from the plant, Rhizobium converts atmospheric nitrogen into a form usable by the plant, aiding in its growth.
The reason for the curdling of milk is Lactobacillus. This bacterium ferments lactose, the sugar in milk, producing lactic acid. The acid causes milk proteins to coagulate and thicken, forming curd. This is a natural process in making curd and ...
The function of ‘Hanle’s loop’ is related to Excretory system. Hanle’s loop, also known as the loop of Henle, is a crucial structure in the nephron of the kidney, involved in the reabsorption of water and electrolytes during urine formation.
Generally, fertilization takes place in the fallopian tube. After ovulation, the egg is released into the fallopian tube where it may encounter sperm for fertilization. If fertilization occurs, the resulting embryo travels down the fallopian tube to implant in the ...
The embryo developing in the uterus gets nourishment primarily By the placenta. The placenta, a temporary organ formed during pregnancy, facilitates the exchange of nutrients, oxygen, and waste products between the mother’s bloodstream and the developing embryo, ensuring its nourishment ...
The complete conversion of sucrose into CO2 and water in the presence of oxygen with the release of energy is called Aerobic respiration. This process involves the breakdown of glucose molecules to produce ATP through oxidative phosphorylation in mitochondria.
The approximate amount of CO2 in our exhaled air is 16%. Exhaled air typically contains a higher concentration of carbon dioxide compared to inhaled air due to the release of CO2 as a byproduct of cellular respiration in the body.