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Hormone such as testosterone/estrogen that could influences sex
Hormone such as testosterone/estrogen that could influences sex

... 3. You are a fish researcher studying a native species cell membrane from Antarctica. How would you expect the membrane composition to be different than species of fish near the equator? Explain. How would this adaptation help the fish to survive? (3 marks) Cell membranes are composed of a phospholi ...
Protein Folding and The Impact of Mutations
Protein Folding and The Impact of Mutations

... each has a specific job to perform The job of each protein is largely determined by its 3dimensional shape  The shape a protein takes depends directly on what kind of amino acids are in that particular protein. ...
Lecture 13 Herbicide resistant plants Resistant plants have been
Lecture 13 Herbicide resistant plants Resistant plants have been

... photosynthesis. In this case, resistant plants were created, by the introduction of bacterial gene that encodes the enzyme nitrilase, which can inactivate bromoxynil before the herbicide can act. The gene for nitrilase was isolated from the soil bacterium Klebsielle ozaenae and placed under the cont ...
activity description – cladogram cytochrome oxidase c
activity description – cladogram cytochrome oxidase c

... Biochemical characteristics, like similarities in nuclear DNA, mitochondrial DNA, or protein structure, can be used to produce cladograms also. If there is strong agreement between the patterns produced using anatomical similarities and those produced by using biochemical structures, it provides wha ...
Chapter 5: Biological Molecules Molecules of Life • All life made up
Chapter 5: Biological Molecules Molecules of Life • All life made up

...  Low blood sugar = Glucagon (pancreas) released  Glycogen broken down releasing glucose o Chitin  Structural polysacch. found in arthropod exoskeletons & fungal cell walls Proteins  Account for over 50% of cell’s dry mass  Functions – enzyme, storage, structural support, transport, movement, ce ...
Notes: More on Nucleic Acids
Notes: More on Nucleic Acids

... 1. Sugar = Ribose 2. Phosphate 3. Base o C–G o A – U (uracil) [There is no T (thymine)]  3 types of RNA: 1. rRNA: [“r” = ribosomal] - structure: ball-like structure with specific “grooves” on the surface, for… - function: synthesize amino acids in to a protein 2. mRNA: [“m” = messenger] - structure ...
Proteins - ISMScience.org
Proteins - ISMScience.org

... What do proteins look like? ...
Protein Synthesis
Protein Synthesis

... • Codons code for an Amino Acid (AAG codes for lysine) • Amino Acids are the building blocks for proteins • Since there are 4 nucleotides, when three are grouped together, there are 64 possible triplet combinations (43 = 64) • However, there are only 20 amino acids so some amino acids have more than ...
Amino Acid Metabolism
Amino Acid Metabolism

... • Amino acids (AAs) are the building blocks of proteins (precursors for proteins) (物质代谢) • Energy metabolites (17.9KJ/g Pr):When degraded, amino acids produce glucose/carbohydrates and ketone bodies(能量代谢) • Precursors for many other biological N-containing compounds , Involved as direct neurotransmi ...
Protein Structure
Protein Structure

... • Hard boiling an egg • Wiping the skin with alcohol swab for injection • Cooking food to destroy E. coli. • Heat used to cauterize blood vessels • Autoclave sterilizes instruments • Milk is heated to make yogurt ...
Amino Acids, Proteins, and Enzymes
Amino Acids, Proteins, and Enzymes

Organic molecules
Organic molecules

... high blood pressure) -trans fats = margarine, beef, pork (raise cholesterol levels) -unsaturated fats = nuts, olive oil -polyunsaturated fats = fish, cooking oils (may help lower cholesterol) Which type is best for you? worst? ...
Amino Acids, Proteins, and Enzymes
Amino Acids, Proteins, and Enzymes

... • Wiping the skin with alcohol swab for injection • Cooking food to destroy E. coli. • Heat used to cauterize blood vessels • Autoclave sterilizes instruments • Milk is heated to make yogurt ...
Amino Acids, Proteins, and Enzymes
Amino Acids, Proteins, and Enzymes

... • Wiping the skin with alcohol swab for injection • Cooking food to destroy E. coli. • Heat used to cauterize blood vessels • Autoclave sterilizes instruments • Milk is heated to make yogurt ...
Objectives • Explain the "one gene–one polypeptide" hypothesis
Objectives • Explain the "one gene–one polypeptide" hypothesis

... stands for methionine (Met), but also functions as a signal to "start" translating an RNA transcript. There are also three "stop" codons that do not code for amino acids, but signal the end of each genetic message. This same genetic coding system is shared by almost all organisms. In experiments, ge ...
lecture 47 slides no animations
lecture 47 slides no animations

... computer code, where the code may be written communally, but all code must be well commented, and all comments in graded code must be written by you, on your own. Since the goal of assignments is to help you and us assess your level of understanding of the material, we require that you understand bo ...
Biochem PowerPoint Presentation
Biochem PowerPoint Presentation

... Protein substance …made on ribosomes Control all chemical reactions in organisms Not changed by the reaction Can be used again Referred to as an “organic catalyst” Lower activation energy (NRG needed to start Rx) Substrate: Substance enzymes works on ...
survey of biochemistry - School of Chemistry and Biochemistry
survey of biochemistry - School of Chemistry and Biochemistry

... • Oxidoreductases catalyze redox reactions - those involving the transfer of electrons ...
Translation Activity - SeaWorld/Busch Gardens ANIMALS
Translation Activity - SeaWorld/Busch Gardens ANIMALS

All Living things pass on their genetic heritage by common
All Living things pass on their genetic heritage by common

... There are 64 possible triplet codons (i.e. 43); 61 are amino acid codons. AUG, the methionine codon, is the START codon UAG, UGA, and UAA are STOP codons. The genetic code is universal (with minor differences in mitochondria and ciliated protozoa) and degenerate (i.e. more than one codon per amino a ...
3.1-Carbohydrates and Lipids
3.1-Carbohydrates and Lipids

...  CHOLESTEROL: starting material for various hormones and is an important part of animal cell membranes ...
Principles of Metabolic Regulation
Principles of Metabolic Regulation

... Principles of Regulation • The flow of metabolites through the pathways is regulated to maintain homeostasis • Sometimes, the levels of required metabolites must be altered very rapidly – Need to increase the capacity of glycolysis during the action – Need to reduce the capacity of glycolysis after ...
Slide 1
Slide 1

... the cysteine chains that are close together to form disulfide bridges. As a result, the hair will remain in the shape that it was held after the perm. This will last until the disulfide bridges naturally break down. If you have very curly hair, the protein in your hair contains a more cysteine than ...
Part 2 - Latona
Part 2 - Latona

... end. lysine ...
Protein synthesis and metabolism
Protein synthesis and metabolism

... • Alanine and glutamine from muscles ...
< 1 ... 541 542 543 544 545 546 547 548 549 ... 622 >

Amino acid synthesis

Amino acid synthesis is the set of biochemical processes (metabolic pathways) by which the various amino acids are produced from other compounds. The substrates for these processes are various compounds in the organism's diet or growth media. Not all organisms are able to synthesise all amino acids. Humans are excellent example of this, since humans can only synthesise 11 of the 20 standard amino acids (aka non-essential amino acid), and in time of accelerated growth, arginine, can be considered an essential amino acid.A fundamental problem for biological systems is to obtain nitrogen in an easily usable form. This problem is solved by certain microorganisms capable of reducing the inert N≡N molecule (nitrogen gas) to two molecules of ammonia in one of the most remarkable reactions in biochemistry. Ammonia is the source of nitrogen for all the amino acids. The carbon backbones come from the glycolytic pathway, the pentose phosphate pathway, or the citric acid cycle.In amino acid production, one encounters an important problem in biosynthesis, namely stereochemical control. Because all amino acids except glycine are chiral, biosynthetic pathways must generate the correct isomer with high fidelity. In each of the 19 pathways for the generation of chiral amino acids, the stereochemistry at the α-carbon atom is established by a transamination reaction that involves pyridoxal phosphate. Almost all the transaminases that catalyze these reactions descend from a common ancestor, illustrating once again that effective solutions to biochemical problems are retained throughout evolution.Biosynthetic pathways are often highly regulated such that building-blocks are synthesized only when supplies are low. Very often, a high concentration of the final product of a pathway inhibits the activity of enzymes that function early in the pathway. Often present are allosteric enzymes capable of sensing and responding to concentrations of regulatory species. These enzymes are similar in functional properties to aspartate transcarbamoylase and its regulators. Feedback and allosteric mechanisms ensure that all twenty amino acids are maintained in sufficient amounts for protein synthesis and other processes.
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