Does single stranded DNA exist in any species?
It exists briefly in all species during the process of genetic replication. Other than this there are mechanisms in eukaryotes to destroy it rapidly, as it could be a sign that the cell has been infected by a virus.
What is permissive effect dealing with hormones?
Permissive effect when dealing with hormones refers to the effect of one hormone on a second whereby the second can exert its full normal effect that is normally associated with it. For example the effect of cortisol on glucagon's ability to increase blood glucose concentration during fasting is a permissive effect. Another one is the effect of Tri-iodothyronine (T3 active form of thyroid hormone) on epinephrine stimulation of lipolysis.
What is preferred in DNA extraction ethanol or isopropanol and why?
Isopropanol is more preferred than ethanol in DNA extraction, as isopropanol facilitates precipitation more better, as it possess very less i.e., 0.6 to 0.7 volumes of alcohol.
How bacteria get mutated against certain drug?
The mutations are random and confer on some members of the bacterial population resistance to certain drugs and these members are the ones selected to survive and reproduce the next population of bacteria with the resistance to these certain drugs.
What is the importance of waxes in biochemistry?
Waxes in biochemistry serve as protective coatings for plants and animals, helping to prevent dehydration and protect against external elements. They also play a role in energy storage and signaling within cells. In organisms, waxes can have structural functions, such as in the formation of the waxy cuticle on plant leaves.
What is the basis of Heller's test in biochemistry?
The basis of Heller's test is
Proteins get denatured when acid is added and this forms a white coagulum which is slightly yellow in colour because of nitro- derivatives of proteins given by aromatic amino acids.
Vitamin A is the fat-soluble vitamin that is important for the health of epithelial cells as it promotes mucus production. It plays a crucial role in maintaining healthy mucous membranes in various tissues throughout the body, including the respiratory tract and digestive system. Deficiency in vitamin A can lead to impaired mucus production and compromised immune function.
What is the chemical symbol of acetylcholine?
The chemical formula (not symbol) of acethylcoline is CH3COO(CH2)2N+(CH3)3.
How temperature affects photosynthesis not only about its rate?
Photosynthesis happens rapidly when there is sunlight. Sunlight is a main factor necessary for Photosynthesis. So if the temperature is not hot enough, photosynthesis might not happen as rapidly as it happens when the sunlight is directly there.
What is a lipid containing sphingosine a fatty acid phosphoric acid and choline?
The molecule described is sphingomyelin, which is a type of sphingolipid. It is composed of sphingosine, a fatty acid, phosphoric acid, and choline. Sphingomyelin is an important component of cell membranes and is especially abundant in the nervous system.
Enzymes play an important role in biological chemistry because they?
Enzymes play an important role in biological chemistry because they lower the amount of energy required for a reaction to take place. Co-enzymes are small non protein molecules that help the enzymatic reaction.
Is it guaranteed that once mRNA is expressed that the encoded gene product is also expressed?
In biology, we do not use the word "Guaranteed". There are so many factors affecting the things and so many permutations and combinations. So many times errors occurs. So we can use the word "generally".
Graphically, a line or many lines going vertically or horizontally in a slanting position, connecting and dis-connecting, and mirroring each other making a 'zigzag'
example:
/\/\/\/\/\/\/\/\/
Why are drug molecules often chiral in order to have positive effects in humans?
Drug molecules are often chiral because their different enantiomers can interact differently with biological systems, including enzymes and receptors. One chiral form may produce the desired therapeutic effect, while the other could be inactive or even harmful. This specificity arises from the complex, three-dimensional nature of biological molecules, where shape and orientation play crucial roles in binding interactions. Therefore, designing chiral drugs can enhance efficacy and minimize side effects.
The tartness of a tangerine .which depends on the concentration of citric acid?
The tartness of a tangerine is primarily influenced by its citric acid concentration, which contributes to its sour flavor profile. Higher levels of citric acid result in a more pronounced tartness, while lower levels yield a sweeter taste. Additionally, factors such as ripeness and variety can also affect the overall flavor, with some tangerines being more tart than others. This balance between acidity and sweetness defines the fruit's unique flavor experience.
What is the enzyme melatonine?
Melatonin is a hormone primarily produced by the pineal gland in the brain that helps regulate sleep-wake cycles. It is not an enzyme, but rather a signaling molecule that plays a key role in controlling circadian rhythms and promoting sleep.
Why is the shape of a protein so important for its function?
proteins are the building blocks for the human body. They are important for the muscles and they are made up of amino acids. Proteins usually improve the texture of the food. They are important for the normal functioning of the body and the deficiency of protein leads to scale formation on the skin, hair fall and it is important to improve the immune system of the huna body.
Do you expect adrenaline to give a positive xanthoproteic test?
No, adrenaline is not expected to give a positive xanthoproteic test. The xanthoproteic test is used to detect the presence of proteins containing aromatic amino acids, which react with nitric acid to form a yellow-colored compound. While adrenaline does contain an aromatic ring, it is classified as a catecholamine, not a protein, and therefore does not typically produce a positive result in this test.
What are the suffixes of nucleic acids?
Amino acids, as their name suggests, are distinguished by having both an amino group and an acid (carboxylate) group. For historical reasons, however, most amino acids end in "-ine", indicating the amine group. The group of amino acids having carboxylate side chains, however, end in "-ate", and includes aspartate and glutamate (sometimes called aspartic acid and glutamic acid). Tryptophan is the odd man out, having a unique indole functional group.
Why is replication of DNA important to the continuity of a species?
Replication of DNA is crucial for the continuity of a species because it ensures that genetic information is accurately passed from one generation to the next. This process allows for cell division, enabling growth and reproduction while maintaining the organism's genetic identity. Additionally, accurate DNA replication helps prevent mutations, which can lead to genetic disorders or affect survival. Overall, it preserves the integrity of the species' genetic blueprint across generations.
What is the difference between one amino acid and another is the?
Assuming that you are talking about the amino acids that are synthesized from tRNA, the difference between one amino acid and another is the 3 letter RNA sequence that calls for the acid: UUG would call for one acid, while AAC will most likely call for another.