Objective Type questions on Molecular Biology

Molecular biology is the study of biology at a molecular level. The field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry. Molecular biology chiefly concerns itself with understanding the interactions between the various systems of a cell, including the interactions between DNA, RNA and protein biosynthesis …

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Molecular biology is the study of biology at a molecular level. The field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry. Molecular biology chiefly concerns itself with understanding the interactions between the various systems of a cell, including the interactions between DNA, RNA and protein biosynthesis as well as learning how these interactions are regulated.

Here few question on molecular biology with solution

1. The centromere
(a) “unzips” DNA molecules.
(b) appears between two daughter cells during binary fission.
(c) determines the location of the nucleus in a cell.
(d) divides chromosomes into two arms of varying lengths.

2. Genes that are found on the same chromosome are said to be
(a) linked.
(b) bound.
(c) intertwined.
(d) bipolar.

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3. Mapping chromosomes reveals
(a) genetic abnormalities.
(b) their location in the cell nucleus.
(c) what kind of cell is being examined.
(d) where specific genes are located.

4. DNA can be read as a code for producing a chain of
(a) cells.
(b) sugars.
(c) amino acids.
(d) salts.

5. A codon is
(a) one three-letter “word” in the genetic code.
(b) a protein cap on the end of a chromosome.
(c) the enzyme that makes DNA replication possible.
(d) a special kind of RNA that provides energy for cell fission.

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6. Transcription is
(a) the exchange of genetic information between the members of a chromosome pair.
(b) another word for binary fission.
(c) the entering of DNA sequences into a computer for analysis.
(d) the process of copying the genetic information from DNA to mRNA.

7. Translation is
(a) another word for binary fission.
(b) the conversion of cell organelles into DNA.
(c) the process of building chains of amino acids from the genetic information copied into mRNA
(d) the process of rearranging a cell’s DNA to change the cell’s function.


8. Ribosomes are
(a) tiny structures in the cell cytoplasm that provide energy for all cell functions.
(b) tiny structures in the cell cytoplasm that control the process of building amino-acid chains.
(c) tiny structures in the cell nucleus that have their own DNA separate from the nuclear DNA.
(d) tiny structures in the cell membrane that control the flow of proteins through the cell wall.

9. The physical expression of genetic information in an organism is called its
(a) phenotype.
(b) genotype.
(c) trait indicator.
(d) protein display.

10. Polygenic traits are those determined by
(a) non-nuclear DNA.
(b) sex.
(c) more than one gene.
(d) only one gene.

 

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