PPSC FPSC KKPSC BPSC SPSC Lecturer Botany MCQs Test No. 66

Those mutations that occur by environmental damage or mistakes during DNA replications are:

During the transcription of a certain protein, an extra cytosine was placed into a gene region, throwing off the correct amino acid sequence. What type of mutation occurred?

Flowers must:

Street trees ( those lining the roads) are generally male. This reduces the cleanup of the streets because the trees only produce  pollen, not fruits. Therefore, the kinds of trees that are normally chosen as street trees are:

Proteins are made of amino acids linked together by specific bonds called:

A ____ made inside the nucleus of a cell associates with proteins to form ribosomes.

Changes in the nucleotide sequence of DNA which are not passed to offspring occur in:

___ portions of chromosomes that stain lightly and only partially condensed:

The offspring of two parents that are heterozygous for a given trait have a __ percent chance of being homozygous for that trait

During meiosis, the chromatids become daughter chromosomes during which stage?

When cancer cells gain the ability to move independently and invade other tissues, they are said to have:

Which of the following would have the same base sequencing in their DNA?

Tay-Sachs disease runs in Seema's family.On a family pedigree, she saw a half darkened circle. This represented:

If you performed a laboratory analysis of DNA , you would find that the amount of adenine is ____ the amount of thymine.

If you were to discover a flower that was small, white and heavily scented, its most likely pollinator would be:

Which of the following chromosomal alterations would you expect to have the most drastic consequences?

You have been asked to collect plant Sperm for a new plant breeding program involving in vitro fertilization. Which of the following tissues would be a good source of sperm?

Which of the following is correct with regard to aneuploidy?

On a pedigree tracing the inheritance of PKU , a horizontal line joins a black square and a half- black circle. What fraction of this couple's children would you expect to suffer from PKU?

A heritable feature is a___ and may have two or more variants called___.

Those mutations that arise in the absence of known mutagen are known:

The most common lethal genetic disease in the United States is:

Which of the following is not needed for DNA transcription?

If a piece of DNA breaks off a chromosome and attaches itself to a nonhomologous chromosome at another location, what type of Change has occurred?

A heritable feature is a___ and many have two or more variants called____.