Essays Tagged: "hydrogen bonds"

Detection of biological molecules. Lab work.

ood style and observations.DETECTION OF BIOLOGICAL MOLECULESIntroduction: Without carbon, nitrogen, hydrogen, sulfur, oxygen and phosphorus, lifewouldn't exist. These are the most abundant elements in ... ndant elements in living organisms. These elementsare held together by covalent bonds, ionic bonds, hydrogen bonds, and disulfide bonds.Covalent bonds are especially strong, thus, are present in monom ...

(6 pages) 122 0 4.6 Oct/1996

Subjects: Science Essays > Biology

The Structure and functions of proteins. This was a timed essay done in 30mins. HUMAN BIOLOGY

s, just a chain of ami. tacids makes up the primary structure. The secondary structure is formed by hydrogen bonds joining the chains in certain places to make an alpha helix or a beta sheet. The tert ... e cell to another, no ATP is needed.Heat can cause a protein to denature, this takes place when the hydrogen bonds break.Ribonuclease is an examle of an enzyme, it breaks down nucleic acid RNA, it has ...

(2 pages) 117 2 4.1 Apr/2002

Subjects: Science Essays > Biology > Human Biology

DNA What is it?

ring between bases of the two chains is highly specific. Adenine is always linked to thymine by two hydrogen bonds, and guanine is always linked to cytosine by three hydrogen bonds. This is known as b ... ogenous base on each strand attracts it's own complement, which as mentioned earlier, attaches with hydrogen bonds. As the bases are bonded an enzyme called DNA polymerase combines the phosphate of on ...

(6 pages) 202 0 2.0 Mar/1997

Subjects: Science Essays > Genetics & Genome Projects

Enzyme-controlled reaction, factors that affect the chemical structure and properties of the enzyme.

es the active site of the enzyme is actually fairly flexible. The heat has broken a small number of Hydrogen bonds which hold the site to its shape. According to the lock and key theory the enzyme's a ... lonate. It is similar in shape to that of succinate and competes for the active site of succinate dehydrogenase which is involved in the krebs cycle. Another example is that of Acetohydroxamic Acid wh ...

(3 pages) 95 0 3.0 Apr/2003

Subjects: Science Essays > Biology

The properties and biological importance's of water to living organisms

states - solid (ice), liquid and gas (water vapor). Water molecules bond to each other by means of hydrogen bonds, and this raises its melting and boiling points substantially. If these bonds did no ... upport in plants.Water molecules have the well-known formula H2O, each moleculecontaining two hydrogen atoms and one oxygen atom.These atoms are covalently bonded together, sharing electrons ...

(6 pages) 50 0 4.6 Feb/2004

Subjects: Science Essays > Biology

Enzyme Summary

r, repeated, coiling and folding of a protein's polypeptide backbone. This folding is stabilized by hydrogen bonds between peptide linkages. These sections of polypeptide chains are repeatedly coiled ... es. They are alpha helixes and beta pleated sheets. Alpha helixes are helical coils stabilized by a hydrogen bond between every fourth peptide bond. They are usually found in fibrous protein such as k ...

(3 pages) 93 0 5.0 Feb/2004

Subjects: Science Essays > Biology

An investigation to compare the reaction rates between potato an hydrogen peroxide and liver and hydrogen peroxide

An investigation to compare the reaction rates between potato and hydrogen peroxide against liver and hydrogen peroxide through loss in mass.Background information:Ca ... otein chain. The secondary structure shows the basic folding of the protein and is held in place by hydrogen bonds. The tertiary structure shows a more complex folding which gives it its globular shap ... product and therefore fewer products will be made in a certain amount of time. Catalase reacts with hydrogen peroxide to form water and oxygen in the cells. Hydrogen peroxide is a toxic chemical that ...

(8 pages) 68 1 4.2 Feb/2004

Subjects: Science Essays

AP Biology: The Properties of Water

roperty is cohesion. The cohesion property is properly defined as the binding of water molecules by hydrogen bonds. Water has this property as a result of the chemical bonding between water. Cohesion ... o overcome strong natural forces, such as gravity. When water is in its liquid state of matter, the hydrogen bonds are very frail and weak, about one-twentieth as strong as covalent bonds. The bonds a ...

(4 pages) 42 1 4.6 Dec/2004

Subjects: Science Essays > Biology

Comparing the solubility's of copper sulphate, sodium chloride and potassium nitrate

n. It takes energy to break bonds between C12H22O11 molecules and it also takes energy to break the hydrogen bonds in water. These hydrogen bonds have to be disrupted in order to insert a sugar molecu ...

(4 pages) 19 0 0.0 Jan/2005

Subjects: Science Essays > Chemistry

Notes explaining the structure of DNA, replication process of DNA, how mutations work in DNA, and the Polymerase chain reaction process

er -The strands have a sugar-phosphate backbone -The two strands are held together by hydrogen bonds -The rungs of the helix consist of purine/pyrimidine rings-Adenine and guanine ... rungs of helix (adenine with thymine and guanine with cytosine) -Adenine and Thymine form 2 hydrogen bonds -Guanine and Cytosine form 3 hydrogen bonds-The helix makes one full turn ever ...

(3 pages) 63 0 2.0 Feb/2005

Subjects: Science Essays > Genetics & Genome Projects

Study notes on the structure and function of various groups of molecules including proteins, carbohydrates, and lipids (fats)

ree-dimensional shape including the various folding and coilings of the polypeptide chain-Result of hydrogen bonds at regular intervals along the polypeptide backbone-Folding produces a spiral Alpha H ... ontortions from bonding between the side chains (R groups) of the various amino acids-Determined by hydrogen bonding between R groups of amino acids-Determined by hydrophobic interactions between nonp ...

(2 pages) 27 0 4.5 Feb/2005

Subjects: Science Essays > Biology

James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin

ble helixes, of alternating phosphate and sugar groups and that the two chains are held together by hydrogen bonds between pairs of organic bases--adenine (A) with thymine (T) and guanine (G) with cyt ...

(4 pages) 32 0 5.0 May/2005

Subjects: Science Essays > Biology

BIOLOGY - Proteins: How They Work By, Jin Chang (me)

quence made of amino acids. The secondary structure is the folding up of the first structure due to hydrogen bonds. The most common of the secondary structure is the alpha helix which makes a spiral l ... are: changes in pH level, changes in salt concentration, and higher temperature (reduce strength of hydrogen bonds).+ Amino Acids and Peptide Bonds Amino Acids are the building blocks of protei ...

(2 pages) 36 0 3.0 May/2005

Subjects: Science Essays > Biology

DNA STRUCTURE AND REPLICATION

s and the bases pair up so that A always pairs with T and G always pairs with C. The A-T pair has 2 hydrogen bonds and the G-C pair has 3 hydrogen bonds. The G-C interaction is therefore stronger (by ...

(1 pages) 56 0 1.0 May/2005

Subjects: Science Essays > Biology

The Importance of Water to Life on Earth.

osystem and how important it is to us today.Each water molecule consists of one oxygen atom and two hydrogen atoms. The oxygen atom bears a slight electronegative charge while hydrogen possesses a mor ... , the water molecules are drawn together. When an oxygen atom is linked to a neighboring molecule's hydrogen atom, a bond called a hydrogen bond is formed. In an ice crystal the hydrogen bonds govern ...

(3 pages) 35 0 3.0 Jan/2006

Subjects: Humanities Essays > Health & Medicine

All About Water

charge. Salt will dissolve into water because polar molecules will dissolve other polar molecules. Hydrogen atoms attract to the oxygen atom because of hydrogen bonds. Water changes temperature slowl ... r concentration of oxygen in the air sacs of the lungs than in the capillaries.Water is made of two hydrogen and one oxygen, so called H2O. A French chemist named Antoine Laurent Lavoisier said that w ...

(2 pages) 34 1 4.2 May/2006

Subjects: Science Essays > Biology

The Importance of Water in Living Organisms

it can be found naturally in all three of its states. However its molecules are bonded together by hydrogen bonds, this raises its melting and boiling points, i.e. its boiling point would be -120&ord ... . Also because it contains slightly negatively charged oxygen atoms and slightly positively charged hydrogen atoms making it polar.Water has been called a universal solvent because of it polarity. Thi ...

(3 pages) 13 0 2.3 Jun/2006

Subjects: Science Essays > Biology

The Importance of Water in Living Organisms

it can be found naturally in all three of its states. However its molecules are bonded together by hydrogen bonds, this raises its melting and boiling points, i.e. its boiling point would be -120&ord ... . Also because it contains slightly negatively charged oxygen atoms and slightly positively charged hydrogen atoms making it polar.Water has been called a universal solvent because of it polarity. Thi ...

(3 pages) 18 0 4.6 Jul/2006

Subjects: Science Essays > Biology

The chemistry of water

A water molecule consists of one atom oxygen with two atoms of hydrogen connected to it forming a “V.” HOH is a polar molecule with means that charges un ... of charges creates a negative charge on the oxygen side and a negative charge on the side with the hydrogen atoms. This creates hydrogen bonding which gives water its unusual characteristics. Hydroge ... hen the positive part of one water molecule attracts a negative part of a different water molecule. Hydrogen bonding makes water have unusual properties that also make life possible on earth.Hydrogen ...

(2 pages) 25 1 2.0 Jun/2007

Subjects: Science Essays > Chemistry

Biotechnology

dipeptides. Explain the use of two named enzymes in biotechnology.Water is the molecule made up of hydrogen and oxygen and it plays a key role in an existence of living organisms. It is due to its pr ... process of photosynthesis. Cohesion occurs when the water molecules stick to one another because of hydrogen bonding. This water property, called also as a surface tension, acts an important role in a ...

(3 pages) 2202 0 0.0 Jan/2008

Subjects: Science Essays > Biology