NEET MDS Mock Test. We covered all the NEET MDS Mock Test in this post for free so that you can practice well for the exam.
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MCQ on Biology Biomolecules for NEET Students
Which of the following makes up a nucleotide?
(A) Base-Sugar unit
(B) Sugar-Phosphoric acid unit
(C) Base-Sugar-Phosphoric acid unit
How do the open structures of D-glucose and D-fructose differ?
(A) The spatial arrangement of the hydroxyl group on the 5th carbon atom is different.
(B) Glucose is an aldose while fructose is a ketose.
(C) Glucose has more hydrogen and fewer oxygen atoms than fructose.
(D) Glucose has five hydroxyl groups while fructose has four hydroxyl groups.
Option b – Glucose is an aldose while fructose is a ketose.
Which of the following vitamins is soluble in water?
(A) A
(B) E
(C) B
(D) D
Option c – B
In which of the following amino acids, the side chain (R group) contains an oxygen atom?
(A) Serine
(B) Isoleucine
(C) Methionine
(D) Cysteine
Option a – Serine
Which of the following contains cobalt?
(A) Hemoglobin
(B) Chlorophyll
(C) Vitamin B12
(D) Vitamin C
Option c – Vitamin B12
Glucose pentaacetate does not condense with hydroxylamine. This indicates ……….
(A) the presence of the free aldehyde group
(B) the absence of the free aldehyde group
(C) the presence of the primary alcoholic group
(D) the absence of the primary alcoholic group
Option b – the absence of the free aldehyde group
How many of the following are non-reducing sugars? Sucrose, maltose, lactose, glucose, cellubiose
(A) 1
(B) 2
(C) 3
(D) 4
Option a – 1
Identify aldoses from the following.
(A) Erythrulose, ribulose
(B) Glucose, ribulose
(C) Fructose, ribose
(D) Galactose, ribose
Option d – Galactose, ribose
Assertion: Vitamin K cannot be stored in our bodies. Reason: Vitamin K is a fat-soluble vitamin.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option d – The assertion is false, Reason is true.
Collagen is an example of a (an) ………..
(A) enzyme
(B) protein
(C) lipid
(D) hormone
Option b – protein
Which of the following is CORRECT about adenine and guanine?
(A) Both are heterocyclic bases containing purine rings.
(B) Both are homocyclic bases containing a benzene ring.
(C) Both have the same molecular formula.
(D) Both have two C = C bonds in their structures.
Option a – Both are heterocyclic bases containing purine rings.
The carbohydrate, which is an important constituent of supporting tissues in plants, is ………
(A) starch
(B) cellulose
(C) glucose
(D) glycogen
Option b – cellulose
Which of the following gives a positive phthalein test?
(A) Leu
(B) Lys
(C) Ser
(D) Tyr
Option d – Tyr
Cheilosis and inflammation of the tongue are due to the deficiency of ……..
(A) vitamin A
(B) thiamine
(C) riboflavin
(D) ascorbic acid
Option c – riboflavin
In biological systems, the RNA molecules direct the synthesis of specific proteins which are characteristic of each kind of organism. This process is known as ………..
(A) transcription
(B) mutation
(C) replication
(D) translation
Option d – translation
The primary structure of proteins refers to ………
(A) mainly denatured proteins and the structure of the prosthetic group
(B) three-dimensional structure, especially between amino acid residues that are distant from each other in the polypeptide chain
(C) the linear structure of amino acid residues in the polypeptide chain
(D) regular folding patterns of continuous portions of the polypeptide chain
Option c – the linear structure of amino acid residues in the polypeptide chain
A pentapeptide contains how many peptide linkages?
(A) 3
(B) 4
(C) 5
(D) 6
Option b – 4
The prosthetic group of glycoprotein is ………
(A) lipid
(B) carbohydrate
(C) protein
(D) nucleic acid
Option b – carbohydrate
Which of the following is a neutral amino acid?
(A) Glutamic acid
(B) Valine
(C) Histidine
(D) Lysine
Option b – Valine
Select the carbohydrate which gives only glucose units on hydrolysis.
(A) Stachyose
(B) Lactose
(C) Cellulose
(D) Raffinose
Option c – Cellulose
Vitamins are classified into four series according to their chemical structures. Which of the following vitamin belongs to the aromatic series?
(A) Vitamin A
(B) Vitamin K
(C) Vitamin C
(D) Vitamin B₁
Option b – Vitamin K
Consider the following compounds: I = Glycine II = Sulphanilic acid III = Benzoic acid Which can form a zwitter ion?
(A) I, II and III
(B) I and II
(C) II and III
(D) I and III
Option b – I and II
Which of the following amino acid reacts with cold nitrous acid (HNO₂) to form N-nitrosoamine (yellow oily)?
(A) Alanine
(B) Proline
(C) Isoleucine
(D) Valine
Option b – Proline
In the case of which amino acid(s), the isoelectric pH value is very low (i.e. less than 5)? I. Histidine II. Aspartic acid III. Glutamic acid IV. Arginine
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
Option b – II and III
Compound X is formed when glucose is heated with HI. Compound Y is formed when glucose reacts with hydroxylamine. Identify X and Y.
(A) X = n-Hexane; Y = Glucoxime
(B) X = n-Hexane; Y – = Gluconic acid
(C) X = Gluconic acid; Y = n-Hexane
(D) X = Glucoxime; Y = Gluconic acid
Option a – X = n-Hexane; Y = Glucoxime
………. is structurally similar to amylopectin but is extensively branched.
(A) Cellulose
(B) Lactose
(C) Cellobiose
(D) Glycogen
Option d – Glycogen
A molecule of raffinose contains how many carbon atoms?
(A) 6
(B) 12
(C) 18
(D) 24
Option c – 18
Among the following, the essential amino acid: is ……….
(A) alanine
(B) methionine
(C) aspartic acid
(D) proline
Option b – methionine
What is the volume of water consumed during acid hydrolysis of 1.368 kg of maltose? (Given molar masses of maltose 342, water = 18, density of water = 1 g/cm³)
(A) 0.072 dm³
(B) 0.720 dm³
(C) 0.18 dm³
(D) 0.018 dm³
Option a – 0.072 dm³
Which of the following is NOT a hormone?
(A) Threonine
(B) Thyroxine
(C) Adrenaline
(D) Androsterone
Option a – Threonine
The number of chiral carbon atoms in the open structure of D-glucose and D-fructose is ………..
(A) 4 in each
(B) 3 in each
(C) 4 in glucose and 3 in fructose
(D) 3 in glucose and 4 in fructose
Option c – 4 in glucose and 3 in fructose
All of the following are examples of fibrous proteins, EXCEPT ……..
(A) fibroin
(B) keratin
(C) collagen
(D) insulin
Option d – insulin
Which of the following acids does NOT amino have an aromatic ring? ( NEET MDS Mock Test )
(A) Tyrosine
(B) Phenylalanine
(C) Tryptophan
(D) Asparagine
Option d – Asparagine
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