Explanation

• Restriction enzymes are also called molecular scissors because they cut DNA at specific recognition sequences.
• They recognize particular short DNA sequences, often 4–8 base pairs long.
• These enzymes may produce sticky ends or blunt ends after cutting DNA.
• They are widely used in genetic engineering, recombinant DNA technology, and gene cloning.
• Example: EcoRI is a restriction enzyme that recognizes the sequence GAATTC.

Last verified on 31-10-2026

Explanation

• The study of the structure of tissues of plants and animals is known as Histology.
• It involves examining the structure, composition, and function of cells and tissues under a microscope.
  

Additional information:

• Geology is the study of rocks and Earth's structure.
• Radiology is the study of medical imaging techniques like X-rays and MRI.

Last verified on 22-01-2026

Explanation

• Osteology is the branch of anatomy that deals with the study of bones.
• The adult human skeleton typically contains 206 bones.
• Bones provide support, protect internal organs, help in movement, store minerals such as calcium and phosphorus, and produce blood cells in the bone marrow.

Additional information:

• Morphology studies the form and structure of organisms.
• Cytology deals with the study of cells.

Last verified on 28-10-2026

Explanation

• The word Botany is derived from the Greek word botanē, meaning grass, herbage, or plants.
• Botany is the branch of biology that deals with the scientific study of plants.
• It includes the study of plant structure, growth, reproduction, classification, and diseases.

Last verified on 28-10-2026

Explanation

• Thymine is a pyrimidine nitrogenous base found in DNA.
• But normally absent in RNA, where uracil takes its place.
• The two pyrimidine bases in RNA are uracil (U) and cytosine (C).
• Adenine (A) and guanine (G) are purine bases found in both DNA and RNA.
• DNA contains A, T, G, C.
• RNA contains A, U, G, C.

Last verified on 25-10-2026