Free MCQs & Online Quiz Practice for Exams

Q: What will happen if a vector (plasmid) is cut with a different restriction enzyme which cuts the external DNA to be incorporated in the vector (plasmid)? (2017 ETEA)

A) Ligation

B) No ligation

C) Tight ligation

D) Cloning

Q: Identify in which of the following the genetic information is catalyzed using reverse transcriptase: (2017 ETEA)

A) Protein→DNA

B) RNA→DNA

C) DNA→RNA

D) RNA→Protein

Q: If the primer annealing temperature is increased to 94°C what will happen? (2017 ETEA)

A) Annealing

B) Extension

C) No annealing

D) Primer dimer formation

Q: All of the following acts as cloning vector except: (2018 ETEA)

A) BAC

B) Cosmids

C) YAC

D) EcORI

Q: Recombinants contain DNA from: (2019 ETEA)

A) 2 different sources

B) Single source

C) 2 same source

D) 3 same sources

Q: DNA fingerprinting refers to: (2019 ETEA)

A) Techniques used for identification of fingerprints of individuals

B) Molecular analysis of profiles of DNA samples

C) Analysis of DNA samples using imprinting devices

D) Both a and c

Q: Which of the following is not necessary for PCR to occur? (2020 ETEA)

A) dATP

B) Primers

C) DNA fragments

D) Ribonucleotides

Q: The ecological factor which does not change from place to place: (2005 ETEA)

A) Precipitation

B) Temperature

C) Gravity

D) Light

Q: Greenhouse effects are NOT produced by the abundance of the gas called: (2006 ETEA)

A) Methane

B) CO2

C) Nitrous oxide

D) SO2

Q: The largest demand of energy is generally fulfilled by: (2007 ETEA)

A) Hydroelectric power

B) Nuclear energy

C) Solar energy

D) Fossil fuels

Q: In an ecosystem having four trophic levels the amount of energy fixed at producer level is 23197 kcal, about how much energy will be produced by the primary consumer? (2007 ETEA)

A) 2317 kcal

B) 232 kcal

C) 1564 kcal

D) None of them

Q: In a pond ecosystem profundal zone is missing because: (2007 ETEA)

A) Pond is shallow

B) Water is turbid

C) Producers are less

D) Water is turbulent

Q: Rabbits, pabulus, rats, grasshoppers and grasses constitute a: (2007 ETEA)

A) Habitat

B) Biome

C) Community

D) Population

Q: The association in which an organism gets advantage and the other suffers is called: (2008 ETEA)

A) Symbiosis

B) Parasitism

C) Predation

D) Mutualism

Q: Which one of the following does not bring about erosion of soil? (2008 ETEA)

A) Carolers forming

B) Extensive ploughing

C) Moderate grazing

D) Heavy grazing

Q: Food is renewable resource due to: (2008 ETEA)

A) Mechanical formatting

B) Improved crop varieties

C) Continuous photosynthesis

D) Pest control

Q: Crop rotation leads to: (2008 ETEA)

A) Increase in the soil nutrient

B) More aeration

C) Soil fertility

D) All of them

Q: SO2 is responsible for the formation of: (2009 ETEA)

A) Acid rain

B) Greenhouse effect

C) Global warming

D) Ozone depletion

Q: Chlorofluorocarbons (CFC) are mainly responsible for: (2010 ETEA)

A) Air pollution

B) Water pollution

C) Acid rain

D) Ozone layer depletion

Q: All of the following are nonrenewable resources of energy except: (2010 ETEA)

A) Forests

B) Iron

C) Petroleum

D) Natural gas