Multiple Choice Questions

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Match the following Column I with Column II.

Column I Column II
A. Complementrary Ratio  1. 9:7
B. Supplementary Ratio 2. 9:3:4
C. Epistatic Ratio 3. 12:3:1
D. Inhibitory Ratio 4. 13:3

  • A-4, B-1, C-3, D-2

  • A-1, B-2, C-3, D-4

  • A-4, B-1, C-2, D-3

  • A-1, B-3, C-2, D-4


B.

A-1, B-2, C-3, D-4

Epistasis is an interaction between two or more genes to control a single phenotype. Dominant epistasis also called masking has a ratio 12:3:1 in the F2 phenotype supplementary genes which is recessive epistasis has ratio 9:3:4

Complementary gene where both dominant alleles are needed for phenotype has ratio 9:7. Inhibitor gene where one gene inhibits is an expression of another gene has ratio 13:3 in F2 progeny.


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Match the following column I with column II.

Column I Column II
A. Carcinogen 1. Cancerous Tumour
B. Anaphase -I 2. Disjunction
C. Mitosis 3. Synapse
D. Zygotene 4. Plectonemic Coiling

  • A-1, B-2, C-4, D-3

  • A-3, B-1, C-4, D-2

  • A-2, B-3, C-1, D-4

  • A-4, B-1, C-3, D-2


The protein products of tumour suppressor gene may

  • Be present in non-cancerous cells

  • Cause signal cell death

  • Regulate the cell cycle

  • All of the above


Which of the following statements is false regarding SDS-polyacrylamide gel electrophoresis?

  • Proteins are separated by molecular weight

  • SDS is a detergent which gives charge to protein

  • Large protein move more slowly through gel

  • SDS is used to maintain the 3-dimensional structure of protein


Which of the following is true regarding the phase lambda, a virus which infects bacteria?

  • In the lytic cycle, the bacterial host replicates viral DNA, passing it on to daughter cells during binary fission

  • In the lysogenic cycle, the bacteria-host replicates viral DNA, passing it onto daughter cells during binary fission

  • In the lytic cycle, viral DNA is integrated into the host genome

  • In the lysogenic cycle, the host bacterial cell burst, releasing phases


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The part of the bacterial chromosomes sharing homology with genome fragment transferred from the recipients to cell during emrozygote formation is known as

  • Eugenic

  • Exogenate

  • Endogenate

  • Dysgenic


In 1944, Avery, McCarty and MacLeod isolated substance from heat killed a virulent form of bacteria and added to the non-virulent form of bacteria which changed the non-virulent to virulent from this substance can be destroyed by

  • DNAse

  • Protease

  • Lipase

  • Amylase


The one advantage of cleistogamy is

  • It leads to greater genetic diversity

  • Seed dispersal is more efficient and wide spread

  • seed set is not dependent on pollinators

  • Each visit of pollinator results in the transfer of hundreds of pollen grains


In a mutational event, when adenine is replaced by guanine, it is a case of

  • Frameshift mutation

  • Transcription

  • Transition

  • Transversion


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In peal plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants could you expect in F1-generation

  • 9 : 1

  • 1 : 3

  • 3 : 1

  • 50 : 50