Tag: test for nutrients

Questions Related to test for nutrients

Oil is obtained from the plant and animal sources can be detected by 

  1. Oil paper test

  2. Starch

  3. Calcium sulphate solution

  4. Iodine solution


Correct Option: A
Explanation:
Some plants and animal produce oil. Oil paper test is a test used to detect oil in plant and animal products. It include a process in which a paper is moved back and forth few times against the substance and the presence of oil on the paper is checked.
So the correct answer is 'Oil paper test'.

Which of the following helps in nutrient conservation?

  1. Leaching

  2. Mineralisation

  3. Nitrification

  4. Immobilisation


Correct Option: B,C
Explanation:

A.Leaching - the loss of water-soluble plant nutrients from the soil. It does not help in nutrient conservation.

B.Mineralisation – The process of formation of minerals from the organic compounds is called mineralisation. It helps in nutrient conservation.

C.Nitrification – Formation of nitrites or nitrates from ammonia or nitrogenous compounds is called Nitrification. It also helps in nutrient conservation.

D. Immobilisation – elements, cannot be transported from one place to another place in the body is called Immobilisation and the elements are called Immobilised elements.

So, the correct option is ‘Mineralisation or Nitrification’. 

Which of the following is made up of amino acids?

  1. Amylase

  2. Glycogen

  3. Phospholipid

  4. Polysaccharide

  5. Ribonucleic acid


Correct Option: A
Explanation:

Amylase is a protein enzyme, a polymer of amino acids. Glycogen is homopolysaccharide of D-glucose with highly branched structure (every 8-12 residues as compared to presence of branches in starch for every 24-30 residues). Phopholipids have phosphate and lipids (carbon and hydrogen atoms) while polysaccharides are polymer of simple sugars. RNA is polymer of ribonucleotides. 

Therefore, the correct answer is option A.

The different amino acids are joined together by peptide bonds to form

  1. Lipids

  2. Proteins

  3. Carbohydrates

  4. Nucleic acids


Correct Option: B
Explanation:

Proteins are the building blocks, which takes part in several metabolic reaction. They have four different levels of structure primary, secondary, tertiary and quaternary. There are 20 different standard L-α-amino acids used by cells for protein construction. Amino acids contain both a basic amino group and an acidic carboxyl group. This difunctionality allows the individual amino acids to join together in long chains by forming peptide bonds: amide bonds between the -NH2 of one amino acid and the -COOH of another. Sequences with fewer than 50 amino acids are generally referred to as peptides, while the terms protein or polypeptide are used for longer sequences. A protein can be made up of one or more polypeptide molecules. The end of the peptide or protein sequence with a free carboxyl group is called the carboxy-terminus or C-terminus. The terms amino-terminus or N-terminus describe the end of the sequence with a free α-amino group. The amino acids differ in structure by the substituent on their side chains. These side chains confer different chemical, physical and structural properties to the final peptide or protein.
So, the correct answer is option B.

Choose the correct answer from the alternatives given:
Amino acids are building blocks of

  1. Carbohydrates

  2. Nucleic acids

  3. Lipids

  4. Proteins


Correct Option: D
Explanation:

Amino acids are the building blocks of polypeptide chain or proteins. These are encoded by the triplet codons of mRNA. Each codon synthesizes a specific amino acid. Example: AUG for methionine, UUU for phenylalanine and so on. Amino acids are connected via the peptide bonds to form the proteins.

Hence, the correct answer is 'Proteins'

Which one of the following will be largely different in various animal species?

  1. Carbohydrates

  2. Fats

  3. Proteins

  4. Enzymes


Correct Option: C
Explanation:

Proteins are the polymers of amino acids linked with peptide bonds and perform various functions like carrier, enzyme or hormone. It is considered the most diverse molecule and differs from animal to animal. The diversity in proteins occurs due to the R group present which changes with the change in the amino acid.

Hence, the correct answer is 'Proteins'.

Which ones are not true?
(a) Glycerol is a 3-carbon alcohol with 3-$OH$ groups as binding sites
(b) Waxes are esters of long chain alcohol and saturated fatty acids
(c) The term protein was coined by Mulder
(d) Agar is an indispensable polysaccharide being a complex polymer of glucose and sulphur containing carbohydrates

  1. a and c only

  2. d only

  3. a and d only

  4. a, b and d only


Correct Option: B
Explanation:

a) Glycerol has chemical formula of  C$ _3$H$ _8$O$ _3$. 3 OH groups act as binding site. The carboxyl end of the fatty acid combines with the three -OH groups of the glycerol to form ester. The statement is true.

b) Wax is a long chain of esters of alcohol and saturated fatty acids. These are hydrophobic. It consists of long alkyl chains. The statement is true.
c)  The term protein was coined by Mulder in 1838. Proteins are building blocks of the body. The proteins are made up of amino acids. The amino acids are linked together by peptide bonds to form a protein. Peptide bond is formed by the linkage of the carboxyl group of one amino acids with the amino group of the amino acids. The statement is true.
d) Agar is a jelly like substance which is mainly derived from agarose present in the cell wall of the algae. The statement is false as it is not a polymer of glucose and sulphur but it is a linear polymer of galactose.
So, the correct answer is option B.

Proteins are a polymerisation product of 

  1. Monosaccharides

  2. Muramic acid

  3. Amino acids

  4. All the above.


Correct Option: C
Explanation:

Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Amino acids are Linked by peptide bonds to form polypeptide chains. Proteins are linear polymers formed by linking the α-carboxyl group of one amino acid to the α-amino group of another amino acid with a peptide bond (also called an amide bond).

So, the correct answer is option C.

Select the correct option:

Acidic amino acids have two $-COOH $ groups and one $-NH _2$ group per molecule. Select the pair that consists of acidic amino acids. 

  1. Aspartic acid, glutamic acid

  2. Lysine, arginine

  3. Glycine, alanine

  4. Both (a) and (b)


Correct Option: A
Explanation:

An amino acid is the structural and functional unit of protein and are made up of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur. These are organic acids with a carboxyl group and one amino group.  Amino acid acts as a buffer. 

Based on the groups that are present on the side chain of amino acid they are divided into various categories. 
Acidic amino acids are the ones that have a carboxyl group in their side chain for example aspartic acid and glutamic acid.
Basic amino acids are the ones that have a basic group and NH2 in their side chain; for example lysine and arginine.
Simple amino acids are the ones that do not have any functional group in their side chain; for example glycine, valine and alanine.

So, the correct option is 'Aspartic acid, glutamic acid'

Sugars are not as good as fats as a source of energy for cellular respiration, because sugars.

  1. Produce toxic amino groups when broken down

  2. Contain more hydrogen

  3. Usually bypass glycolysis and the Krebs cycle

  4. Contain fewer hydrogen atoms and electrons


Correct Option: A
Explanation:

Sugars, when broken down, produces toxic amino groups. During Cellular Respiration, sugar is broken down to CO$ _2$and H$ _2$O, and in the process, ATP is made that can then be used for cellular work. Carbohydrates, fats, and proteins can all be used as fuels in cellular respiration, but glucose is most. In glycolysis, the 6-carbon sugar, glucose, is broken down into two molecules.

So the correct answer is 'Produce toxic amino groups when broken down'.