CUET · BIOLOGY · PYQ PAPER 2023
Read the paragraph given below and answer the question.
Insulin used for diabetes was earlier extracted from slaughtered cattle and pigs. Insulin from an animal source, though caused some patients to develop allergy or other type of reactions. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked bridges. In mammals, including human, insulin is synthesised as a pro-hormone.
Bonds which link 'A' and 'B' peptide chains of human insulin are
- A Peptide
- B Disulfide
- C Covalent
- D Hydrogen
Answer & Solution
Correct Answer
(B) Disulfide
Step-by-step Solution
Detailed explanation
Disulfide
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from BIOLOGY
- The gynoecium represents the female reproductive part of the flower. When gynoecium is having more than one pistils and the pistils are fused together, the condition is called:CUET 2025 Hard
- Removal of vas deferens surgically is called:CUET 2023 Hard
- Propionibacterium sharmanii is used in the production of :CUET 2023 Easy
- Match List-I with List-II
Choose the correct answer from the options given below:List-I (Types of inheritance) List-II (Examples) (A) Pleiotropy (I) ABO blood grouping in human (B) Polygenic inheritance (II) Snapdragon plant (C) Incomplete dominance (III) Phenylketonuria (D) Co-dominance (IV) Human skin colour CUET 2025 Hard - Read the following passage carefully and answer the given questions.
Restriction endonuclease on finding its specific recognition sequence, bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). Now a days the most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. The first restriction endonuclease-Hind II, whose functioning depended on a specific DNA nucleotide sequence was isolated and characterised five years later. It was found that Hind II always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs. In addition to 'ori', the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli
Chitinase is used to disrupt the membranes of:CUET 2025 Hard - Match List-l with List-ll
List-l (Term) List-II (Explanation) (A) Natality (I) Number of the same species individuals that have come into the habitat (B) Immigration (II) Number of deaths during a given time in a population (C) Mortality (III) Number of the same species individuals that have left the habitat (D) Emigration (IV) Number of births during a given time in a population
Choose the correct answer from the options given below:CUET 2025 Easy
More PYQs from CUET
- Read the passage carefully to answer the questions given below
Some strains of `Bacillus thuringiensis` produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). In `Bacillus thuringiensis` the toxin is coded by a gene `crylAc` named cry. There are a number of them, for example, the proteins encoded by the genes `crylAc` and `cryllAb` control the cotton bollworms, that of `crylAb` controls corn borer. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. `RNAi` takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific mRNA due to a complementary `dsRNA` molecule that binds to and prevents translation of the `mRNA`.
Some strains of `Bacillus thuringiensis` produce proteins that do not kill ceratin organisms -CUET 2025 Hard - The corner points of the feasible region determined by the system of linear inequalities are \((0,0)\), \((2,4),(7,3)\) and \((5,0)\). If the maximum value of \(z=p x+q y\), where \(p, q>0\) occurs at both \((2,4)\) and \((7,3)\), then :CUET 2023 Hard
- A circular loop of 20 turns carries a current of 5.0 A. If the magnetic field at the centre of the loop is 1.57 mT, the radius of the loop would be :CUET 2023 Medium
- For two matrices \(A=\left[\begin{array}{cc}3 & 4 \\ -1 & 2 \\ 0 & 1\end{array}\right]\) and \(B^T=\left[\begin{array}{ccc}-1 & 2 & 1 \\ 1 & 2 & 3\end{array}\right], A-B\) equalsCUET 2025 Easy
- Read the paragraph and answer the question.
Broadly, genetic disorders may be grouped into two categories - Mendelian disorders and Chromosomal disorders. Mendelian disorders are mainly determined by alteration or mutation in the single gene. These disorders are transmitted to the offspring on the same lines as we have studied in the principle of inheritance. The trait may also be linked to the sex chromosome as in case of haemophilia. It is evident that this X-linked recessive trait shows transmission from carrier female of male progeny.
Which of the following disease is a result of aneuploidy?
(A) Turner's Syndrome
(B) Klinefelter's Syndrome
(C) Down's Syndrome
(D) Phenylketonuria
Choose the correct answer from the options given below:CUET 2023 Medium - Plasmodium enters the human body as:-CUET 2023 Hard