General Science - Online Test
Q1. Dry ice is
Answer : Option A
Explaination / Solution:
Dry ice is solid CO2.
Solid CO2 sublimates. Thus it does not wet anything and called dry ice.
Q2. A baby has been born with a small tail. It is the case exhibiting
Answer : Option D
Explaination / Solution:
Avetism is the tendency to revert to ancestral type. It is a kind of evolutionary throwback, such as traits reappearing which had disappeared generation before. Baby born with small tail is a case of atavism.
Q3. Which of the following procedure is not correctly matched?
Answer : Option B
Explaination / Solution:
ZIFT- Zygote intra fallopian transfer is part of test tube baby programme in which in vitro fertilized zygote in transferred to fallopian tube for implantation and further growth of foetus.
Q4. Process used for amplification or multiplication of DNA for finger printing is
Answer : Option C
Explaination / Solution:
Polymerase chain reaction (PCR) is a wonderful technology for amplifying DNA. It allows you to take a specific region of DNA on the chromosome and through the use of primers, copy back and forth, only a particular desired segment, making two, then four, then eight, then sixteen, and so on, up to millions of copies.
It is possible to start from the DNA segment of a single cell and produce enough of it for use in DNA typing or fingerprinting.
Q5. The process of formation of primary organ rudiment is called
Answer : Option C
Explaination / Solution:
During gestation period organs formation started after three weeks these organs are not completely developed and called primary organ rudiment. The process of formation of primary organ rudiment is called tabulation.
Q6. _____ is an act of abstinence from consumption
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. In trivalent state, for example, the trichlorides, being covalent are hydrolysed in water form
Answer : Option D
Explaination / Solution:
Trihalides hydrolysis to form tetrahedral structure with four covalent bonds.
Q8. Which is not a vestigial organ of man?
Answer : Option D
Explaination / Solution:
Vestigial organs are those organs which were functional in our ancestor but become functionless in present form of human beings.
Nail is not a vestigial organ of man as our fingernails are proportionately the same size as our wild counterparts, they are Not reduced structures. They still maintain their original function so they are Not atrophied or functionless.
Q9.
Statement I: In zygote intra fallopian transfer(ZIFT) embryo upto 8 blastomeres are transferred into fallopian tube.
Statement II: In intra uterine transfer, embryo more than 8 blastomeres are transferred to uterus.
Answer : Option A
Explaination / Solution:
In test tube baby programme, sperms and ovum are fertilized in laboratory condition to form zygote. If embryo is transferred up to 8 blastomeres, it is called ZIFT. If embryo having more than 8 blastomeres, it is transferred to uterus called IUT.
Q10. DNA probes used in finger printing are
Answer : Option A
Explaination / Solution:
In finger printing the nylon membrane was incubated with radioactive probes. DNA Probes are small fragments of minisatellite DNA tagged with radioactive phosphorous. The probes only attach to the pieces of DNA that they are complementary to – in this case they attach to the minisatellites in the genome. Radioactive isotopes can be easily identified using scanner.
