Download App

Biomolecules — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules5 Marks
Question
  1. State two main differences between globular proteins and fibrous proteins.
  2. Based on their chemical composition, state how are lipids classified Give one example of each class.
✓

Answer

  1. Sr. No.
    Globular Proteins
    Fiberous Proteins
    I.
    II.
    They are cross linked condensation products .
    Three dimensional spherical shape.
    They are linear condensation products.
    Rod like rigid shape.
  2. Lipids are naturally occuring compounds related to fatty acids which include fats, oils, waxes, etc.
  1. Simple lipids (Homolipids): e.g, neutral fats/waxes.
  2. Compound Lipids (Hetrolipids): e.g, Phospholopids/Glycolipids.
  3. Derived Lipids: fatty acids/fatty alcohols/steroids/terpenes, etc.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Biomolecules→Biomolecules — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

  1. Name the three major classes of carbohydrates and give an example of each of these classes.
  2. Answer the following:
  1. What type of linkage is responsible for the primary structure of proteins?
  2. Name the location where protein synthesis occurs in our bod.
→
After watching a programme on TV about the presence of carcinogens (cancer causing agents) Potassium bromate and Potassium iodate in bread and other bakery products, Ritu a class XII student decided to aware others about the adverse effects of these carcinogens in foods. She consulted the school principal and requested him to instruct canteen contractor to stop selling sandwiches, pizza, burgers and other bakery products to the students. Principal took an immediate action and instructed the canteen contractor to replace the bakery products with some proteins and vitamins rich food like fruits, salads, sprouts etc. The decision was welcomed by the parents and students. After reading the above passage, answer the following questions:
  1. What are the values (at least two) displayed by Ritu?
  2. Which polysaccharide component of carbohydrates is commonly present in bread?
  3. Write the two types of secondary structure of proteins.
  4. Give two examples of water soluble vitamins.
→
  1. Although nitrogen and chlorine have nearly same electronegativity yet nitrogen forms hydrogen bonding while chlorine does not. Why?
  2. What happens when $F_2$ reacts with water?
  3. Write the name of the gas evolved when $Ca_3P_2$ is dissolved in water.
  4. Write the formula of a noble gas species which is isostructural with $IBr_2$.
  5. Complete the equation:
$[Fe(H_2O)_6]^{2+}$ + NO $\longrightarrow$
→
  1. State Raoult’s law for a solution containing volatile components.
How does Raoult’s law become a special case of Henry’s law?
  1. $1.00\ g$ of a non-electrolyte solute dissolved in $50\ g$ of benzene lowered the freezing point of benzene by $0.40\ K$. Find the molar mass of the solute. $(K_f$ for benzene$= 5.12\ kg\ mol^{-1})$.
→
What are the classification of proteins on the basis of molecular shape?
→
Match the terms given in Column I with expressions given in Column II.
  Column I   Column II
i. Mass percentage a. $\frac{\text{Number of moles of the solute component}}{\text{Volume of solution in litres}}$
ii. Volume percentage b. $\frac{\text{Number of moles of a component}}{\text{Total number of moles of all the components}}$
iii. Mole fraction c. $\frac{\text{Volume of the solute component in solution}}{\text{Total volume of solution}}\times100$
iv. Molality d. $\frac{\text{Mass of the solute component in solution}}{\text{Total mass of the solution}}\times100$
v. Molarity e. $\frac{\text{Number of moles of the solute components}}{\text{Mass of solvent in kilograms}}$
→
Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.
→
Answer the following question:
Account for the following:
  1. $SnCl_4$​​​​​​​ is more covalent than $SnCl_2​​​​​​​$​​​​​​​.
  2. Tendency to form pentahalides decreases down the group in group $15$ of the periodic table.
→
Answer the following question:
What is the freezing point of 0.4 molal solution of acetic acid in benzene in which it dimerises to the extent of $85 \%$ ? Freezing point of benzene is 278.4 K and its molar heat of fusion is $10.042 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
→
Match the compounds given in Column I with the oxidation state of cobalt present in it (given in Column II) and assign the correct code.
 
Column I (Compound)
 
Column II (Oxidation state of Co)
$a.$
$[Co(NCS)(NH_3)_5](SO_3)$
$1.$
$+4$
$b.$
$[Co(NH_3)_4Cl_2]SO_4$
$2.$
$0$
$c.$
$Na_4[Co(S_2O_3)_3]$
$3.$
$+1$
$d.$
$[Co_2(CO)_8]$
$4.$
$+2$
 
 
$5.$
$+3$
Code:
  1. $A (1), B (2), C (4), D (5).$
  2. $A (4), B (3), C (2), D (1).$
  3. $A (5), B (1), C (4), D (2).$
  4. $A (4), B (1), C (2), D (3).$
→