The technique that uses antibodies to detect specific proteins in a sample is: MCQ with Answer and Explanation

The technique that uses antibodies to detect specific proteins in a sample is:
A. Southern blotting
B. ELISA
C. Northern blotting
D. PCR
Answer: Option B
Solution (By JKSSB Mock Tests)
ELISA (enzyme-linked immunosorbent assay) uses enzyme-linked antibodies to detect and quantify specific antigens or antibodies in a sample. PCR amplifies DNA, Northern blotting detects RNA, Southern blotting DNA.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The process of uptake of liquid droplets by the cell membrane is:
A. Exocytosis
B. Pinocytosis
C. Phagocytosis
D. Osmosis

Correct Answer: Option B


Explanation:
Pinocytosis ('cell drinking') is a form of endocytosis where the cell membrane invaginates to take in a small droplet of extracellular fluid and dissolved solutes. Phagocytosis is 'cell eating' of large particles, exocytosis is secretion, osmosis is water movement across a semipermeable membrane.

This question belongs to: Science Biology
Question #2
DNA replication is said to be semi-conservative because:
A. Each new DNA molecule consists of one old (parental) strand and one newly synthesized strand
B. DNA is replicated only during the S phase
C. Both strands of the new DNA molecule are newly synthesized
D. Replication occurs in both directions from the origin

Correct Answer: Option A


Explanation:
Semi-conservative replication means that when a new DNA double helix is formed, it consists of one original (parental) strand and one newly synthesized strand. This was proven by the Meselson-Stahl experiment in 1958 using isotopes of nitrogen (15N and 14N) in E. coli. This mechanism ensures genetic continuity.

This question belongs to: Science Biology
Question #3
The concept of 'survival of the fittest' was proposed by:
A. De Vries
B. Mendel
C. Lamarck
D. Darwin

Correct Answer: Option D


Explanation:
'Survival of the fittest' was a phrase used by Herbert Spencer but adopted by Darwin to describe natural selection—organisms best adapted to the environment survive and reproduce. Lamarck proposed inheritance of acquired characters, Mendel discovered laws of heredity, De Vries proposed mutation theory. Darwin's theory emphasizes differential reproductive success of variants.

This question belongs to: Science Biology