Saturated fatty acids are called as such because they do not have many double or triple bonds in their structure; each carbon is bound to four other atoms, and this fact makes it quite easy to stack the fatty acid molecules together closely. You also get idea about the type of questions and method to answer in your class 12th examination. Between which carbon atoms of pentose sugars of nucleotides are these linkages present? Chemistry Class 12 Important Questions are very helpful to score high marks in board exams. How do these bonds work? These opposite charges on separate but adjacent molecules can then work to create hydrogen bonds between the molecules. They are heterogeneous group containing mainly carbon, oxygen and hydrogen. Why does soap remove grease from pans when we wash dishes? The primary structure of a protein involves: Disulfide linkages Peptide bonds Hydrogen bonds Hydrophobic forces None of the above Leave blank.
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these a Enhance oxidative metabolism b Help in regulating metabolism c are conjugated proteins d are exclusively synthesised in the body of a living organism as at present Answers 1. In contrast, in covalent bonding, the electrons are shared between the two atoms. This fact means that you would be less likely to freeze to death during your overwintering. Choose the correct answer out of the following choices. What holds them together is the fact that opposites attract: electrons are stolen rather than shared in the ionic bond. Lactose is composed of a glucose + galactose b fructose+ galactose c glucose + fructose d glucose + glucose 9. This would be a good idea because a mile is not a very long distance, and what you would need is quick energy.
Proteins, Carbohydrates, Lipids and Nucleic acids are the most abundant bio molecules. When you finish, click the Grade It! The chemical union of the basic units of carbohydrates, lipids, or proteins always produces the biproduct: Energy Carbon Water Acid None of the above Leave blank. All molecules or chemicals functional in living organisms are known as biomolecules. What are the bonds between amino acids called? They contain fatty acids They are used as storage fats They are lipid soluble They are rich in hydrogen None of the above Leave blank. Percentage score will be displayed along with right answers. Which type of interactions are responsible for making the α-helix structure stable? The major role of minor elements inside living organisms is to act as a Co factors of enzymes b Binder of cell structure c Constituent of hormones d Building blocks of important amino acids 5.
Saturated fats: Have many double bonds Have no double bonds Tend to be oily Are associated with heart disease electrostatic charges Leave blank. Water present in human body is a 60-65% b 70-75% c 65-70% d 75-80% 3. Why is it called so? Which of the following disaccharide is a non-reducing sugar? Would you expect to see differences in the amounts of saturated and unsaturated fatty acids? Proteins are made of amino acids, and nucleic acids are made of nucleotides. Reason : Carbohydrates are hydrates of carbon so compounds which follow C x H 2O y formula are carbohydrates. In this case, no electrons are exchanged or shared. Be sure to consider both their structures and their functions. Which of the following statements is true? Show the peptide linkage in glycylalanine.
Mark the letter of your choice then click on the next button. If you were a rodent preparing for hibernation, or a bird preparing for an autumn migration, what type of biomolecule would you want to use for energy storage? Pearson, as an active contributor to the biology learning community, is pleased to provide free access to the Classic edition of The Biology Place to all educators and their students. In which type of biomolecules are they present? What is the most common monosaccharide? What does the word diester in the name of linkage indicate? Proteins and nucleic acids are also similar in that both have tertiary structure to them. Do they form between atoms, molecules, or ions? A buffer is a molecule that can help to control the pH of a solution by taking up a hydrogen or releasing one into solution, depending on the surrounding pH. Your score will be posted as soon as the you are done with the quiz. The number of carbon atoms present in the monosaccharide molecule are also considered for classification.
Why might it be advantageous to overwinter at the bottom of a pond rather than on land? Reason : It is an essential amino acid. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6? If blood becomes too acidic, that fact means that there is an excess of hydrogen ions in the blood. In hydrogen bonds, the weakest kind of bond, the partial charge of the hydrogen atom is what attracts it to the slightly negative charge of another atom. Which of the following are acidic? In which of the following groups are all polysaccharides? At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide? What is the difference between α-helix and β-pleated sheet structure of proteins? In what ways are they different? How many monosaccharide units are present in it? The structure of a protein can be denatured by its particular heat the presence of oxygen the polar bonds of water molecules the presence of carbon dioxide gas 5. Which of the following have as prosthetic group a Glycoprotein b Lipoprotein c Nucleoprotein d Chromoprotein 8. Interestingly, many of these species choose to spend the winter underwater. Click it to see your results.
At the end of each activity, you can assess your progress through a Self-Quiz. They are different in their functions. Living cell contains 60-95% water. When you have completed the practice exam, a green submit button will appear. Polymers of polysaccharides, fats, and proteins are all synthesized from monomers by: Connecting monosaccharides together The addition of water to each monomer The removal of water dehydration synthesis Ionic bonding of the monomers The formation of disulfide bridges between monomers Leave blank.
Reason : Most naturally occurring amino acids have L-configuration. Amino acids are the building blocks of. How can cyclic structure of glucose explain these reactions? You have to match column A with column B and select correct option given below as correct answer. Therefore, saturated fats are solid at room temperature. What is the general formula for carbohydrates? They both have carbon, nitrogen, and hydrogen, but are made of different molecular components. Which acid is involved in the formation of this linkage? If you were preparing for hibernation, however, or a long distance migration, you would want to use fat for storage because fat stores, per gram, twice as much energy as carbs or protein, and can therefore last the distance. The best explanation of hydrogen bonding is in the case of the water molecule.
Which is a linear polysaccharide? Choose the best answer from the four options given. The hydrolysis is accelerated by the presence of Ca++ ions. Exam Instructions: Choose your answers to the questions and click 'Next' to see the next set of questions. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. The first two steps are reversible in which Diglyceride and Monoglyceride and produced as intermediate products. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate.