Genetics & Inheritance: 25 MCQs with Explanations

Nucleo-proteins is the correct answer to “Which of the following proteins have role in heredity”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Zygote with three copies chromosome 21, is known to cause Downs syndrome .

mesosome is the correct answer to “Which one of these structures involved in replication of bacterial dna”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Plasmid is the correct answer to “Which of the following contains genes for drug and disease resistance in bacteria”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Influenza virus is the correct answer to “Which of the following is an RNA virus:”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

In the lytic cycle of bacteriophage the host DNA is Digested into its nucleotides .

An enzyme which can convert single stranded RNA into double stranded viral DNA is called Reverse Transcriptase .

In lysogenic cycle the process of spearation of phage DNA from the hosts chromosome and initiation of lytic cycle is called Induction .

In the Lysogenic cycle the DNA of the bacteriophage Joins the bacterial chromosomes .

DNA or RNA of viruses is enclosed in Protein coat.

rRNA constitutes 80% % of the total cellular RNA.

Which conjegated molecules play important role in gene expression Nucleohistones .

Genes will not be found in gene pairs in the Sperm cells of frog .

It produces mRNA is the correct answer to “Which statement correctly describes the transcription of DNA”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The basic structural unit of a chromosome is Nuceleosome .

Each turn of DNA contain 10 nitrogenous base pairs.

Purines and pyrimidines are in equal ration in DNA. It was indicated by Chargaff .

The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by Molecular biologists .

Un-separated replica of chromosome is called Chromatid .

Exact replica of chromosome refers to Chromatid .

Messenger RNA is formed in nucleus .

1 is the correct answer to “Number of chromosomes in E.coli”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Conclusion of Mendels work latter became a Scientific law .

Molecular biologists is the correct answer to “The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by”. Items of this type are drawn from the Genetics & Inheritance syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Functional unit of DNA Is Genes .