Biochemistry

It is not a DNA base pair itself, it is a DNA nucleotide base. It does however, form a base pair when bonded with adenine.

The sympathetic nervous system. The hypothalamus, in close association with the limbic system of the brain. The "fight or flight" response is the term used for the activation of the sympathetic nervous system. The two main chemicals invoved here are the neurotransmitter "norepinephrine" (noradrenaline) and the hormone "epinephrine" (adrenaline). Noradrenaline is produced in the neurones and is secreted at the synapse to exert its "sympathetic" activity on various organs throughout the body. The nervous system is also responsible for eliciting epinephrine production from the adrenal medulla (a part of the suprarenal glands situtated on the top of each kidney).

The amount of heat produced in a reaction is not fixed. It depends upon the total amount of energy change that has taken place in the reaction altogether.

Not only this, all reactions do not produce heat. In some cases we have to supply energy from external sources to get the reaction started.

A colorimeter is used to measure the absorbance of specific wavelengths of light by a particular solution. This is used to determine the concentration of a known solute in a solution using Beer's law. This law states that the concentration of a solute is proportional to the absorbance.

The plant cell and the animal cell are similar in many ways the both have a nucleus, lysosomes, mitochondria, and a cell membrane. But there are also many things that set them apart from each other. And plant cell is a rectangular shape where as an animal cell is circular. A plant cell has chloroplast, which contains a green pigment called chlorophyll. Chlorophyll is what makes green leaves green. A plant cell also has a cell wall, a rigid protective layer of a plant cell.

Lithium and fluorine combine to form lithium fluoride. Another element that could combine with fluorine in a similar manner to lithium is sodium, which would form sodium fluoride. Both lithium and sodium belong to the alkali metal group and share similar chemical properties.

Lipase is the enzyme that hydrolyzes lipids.

Platinum is not naturally found in the human body. It is a rare and precious metal that is typically used in jewelry, industrial catalysts, and medical devices, but it is not a natural component in human biology.

A permanent heritable change in an allele that produces a different variant of the same trait is called a mutation. Mutations can lead to genetic diversity within a population and are the raw material for evolution.

Paramecium are heterotrophs (consumers) so they do not go through photosynthesis. They consume their food through a process called phagocystosis (a process where the cell engulfs food particles by forming membrane-bound vesicles that enter the cytoplasm)

semiconservative replication - original DNA double strand will unwind into 2 strands, so one original strand will serve as a template for synthesizing a new complementary strand , thus forming a new DNA (one with old strand and one with a new strand)

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose or other organic compounds. This process involves the conversion of carbon dioxide and water into sugars using the energy absorbed from sunlight by chlorophyll. Oxygen is produced as a byproduct of this reaction.

The nuclear membrane disappears during prophase of mitosis. This allows the chromosomes to be condensed and move freely within the cell. At the end of mitosis, during telophase, the nuclear membrane reforms around the separated chromosomes.

Trans-membrane diffusion.

Sugar provides quick energy for the body, can improve mood by triggering the release of serotonin, a feel-good hormone, and can enhance the taste of foods and beverages. However, consuming sugar in excess can lead to negative health effects such as weight gain and increased risk of chronic diseases.

Using wine to illustrate, the amount of sugar available to the yeast determines how much ethanol will be produced - up to 'a point', say a 13% ethanol solution: a concentration higher than this cannot be obtained [without distillation technology] because Yeast cannot tolerate it.

The membrane is selectively permeable if it only allows certain substances like water, oxygen, carbon dioxide, and glucose to pass through while blocking others based on size, charge, or other properties.

Purifying a protein helps to isolate and concentrate the protein of interest from a complex sample, removing unwanted contaminants. This allows for further characterization and analysis of the protein's structure, function, and interactions. Purified proteins are also crucial for biological assays, structural studies, and therapeutic applications.

no not always due to some phenotypes having more than one gene sequence that affects it, eg; the base sequence for a certain enzyme's synthesis could be TTT but by substituting a T with a C to make TTC in mutation could still be a code for the same enzyme...

Yes, enzymes are typically proteins that act as biological catalysts to speed up chemical reactions in living organisms. They have specific shapes that allow them to bind to specific molecules and facilitate the conversion of substrates into products.

Atrial natriuretic hormone promotes natriuresis and diuresis, which helps to reduce blood volume and blood pressure. It also inhibits the renin-angiotensin-aldosterone system, leading to vasodilation and decreased sodium reabsorption.

In competitive inhibition, the inhibitor competes with the substrate for the active site of the enzyme, increasing Km (substrate concentration needed for half maximal velocity) but not affecting Vmax (maximum velocity of the reaction). In non-competitive inhibition, the inhibitor binds to a site other than the active site, reducing the enzyme's activity by lowering Vmax without affecting Km.

The neutralization solution is used to balance the pH after the addition of an alkaline lysis solution during plasmid DNA extraction. This helps to stabilize the DNA for subsequent use or storage. Additionally, neutralization stops the denaturation process that occurs during lysis, preserving the integrity of the DNA.

Organic compounds are, by definition, compounds of Carbon.And it may be defined as hydrocarbons and derivatives.

Yes, Nitrogen is an integral and common bio-element found primarily in proteins. Instead of the -C-C-C-C-C-C- of lipids, an added N gives a great structural boost, as in the peptide chain -C-C-N-C-C-N-C-C-N-C-C-N- etc.