Match List-I with List-II regarding RNA Polymerase Subunits.
List-I (Factor)
List-II (Role)
A. Sigma Factor
I. Elongation
B. Rho Factor
II. Initiation
C. Core Enzyme
III. Termination
Sigma factor initiates transcription. Rho factor terminates it. The Core enzyme carries out elongation.
Question 622 of 668
📘 CLASS XII
Match List-I with List-II regarding DNA vs RNA.
List-I (Feature)
List-II (Molecule)
A. 2-prime OH group
I. DNA
B. Thymine
II. RNA
C. Double Stranded (usually)
III. DNA
D. Catalytic activity (Ribozyme)
IV. RNA
RNA has a 2-prime OH group making it reactive. DNA contains Thymine. DNA is typically double-stranded. RNA can act as a catalyst (Ribozyme).
Question 623 of 668
📘 CLASS XII
Match List-I with List-II regarding HGP Goals.
List-I (Goal)
List-II (Action)
A. Sequencing
I. Address ELLS issues
B. Storage
II. Determine order of 3 billion bases
C. ELSI
III. Store information in databases
Sequencing determines the base order. Storage involves databases (Bioinformatics). ELSI addresses Ethical, Legal, and Social Issues.
Question 624 of 668
📘 CLASS XII
Match List-I with List-II regarding Histone Amino Acids.
List-I (Amino Acid)
List-II (Property)
A. Lysine
I. Basic, Positive charge
B. Arginine
II. Basic, Positive charge
C. Glutamic Acid
III. Acidic, Negative charge
Lysine and Arginine are basic and positive, abundant in histones. Glutamic acid is acidic and negative.
Question 625 of 668
📘 CLASS XII
Match List-I with List-II regarding tRNA structure.
List-I (Feature)
List-II (Shape/Part)
A. 2D Structure
I. Inverted L
B. 3D Structure
II. Clover-leaf
C. Acceptor Arm
III. Binds Amino Acid
D. Anticodon Loop
IV. Reads mRNA codon
The 2D structure is a clover-leaf. The 3D structure is an inverted L. The Acceptor Arm binds the amino acid. The Anticodon loop reads the mRNA.
Question 626 of 668
📘 CLASS XII
Match List-I with List-II regarding DNA Replication Directions.
List-I (Process)
List-II (Direction)
A. Synthesis of New Strand
I. 5-prime to 3-prime
B. Reading of Template Strand
II. 3-prime to 5-prime
C. Bond formation
III. 3-prime to 5-prime (relative to new strand)
New strands are always synthesized 5-prime to 3-prime. The template is read 3-prime to 5-prime. Phosphodiester bond formation involves attacking the 3-prime end, directionally extending 5-to-3, but chemically linking 3-to-5.
Question 627 of 668
📘 CLASS XII
Match List-I with List-II regarding Central Dogma.
List-I (Process)
List-II (Flow)
A. Replication
I. DNA to DNA
B. Transcription
II. DNA to RNA
C. Translation
III. RNA to Protein
D. Reverse Transcription
IV. RNA to DNA
Replication: DNA to DNA. Transcription: DNA to RNA. Translation: RNA to Protein. Reverse Transcription: RNA to DNA (Retroviruses).
Question 628 of 668
📘 CLASS XII
Match List-I with List-II regarding Early Scientists.
List-I (Scientist)
List-II (Discovery)
A. Friedrich Miescher
I. Nuclein
B. Altmann
II. Nucleic Acid (Renaming)
C. Watson & Crick
III. Double Helix
Miescher discovered Nuclein. Altmann renamed it Nucleic Acid. Watson and Crick proposed the Double Helix.
Question 629 of 668
📘 CLASS XII
Match List-I with List-II regarding Genetic Code Specifics.
List-I (Number)
List-II (Item)
A. 64
I. Total Codons
B. 61
II. Sense Codons (coding for amino acids)
C. 3
III. Stop Codons
D. 20
IV. Standard Amino Acids
There are 64 total codons. 61 code for amino acids (Sense). 3 are Stop codons. There are 20 standard amino acids.
Question 630 of 668
📘 CLASS XII
Match List-I with List-II regarding S-strain vs R-strain.
List-I (Strain)
List-II (Feature)
A. S-strain
I. Smooth, Virulent, Capsule present
B. R-strain
II. Rough, Non-virulent, No capsule
S-strain is Smooth, Virulent, and Capsulated. R-strain is Rough, Non-virulent, and Non-capsulated.
