Biology - Online Test
Q1. For DNA finger printing, the DNA is obtained from
Answer : Option B
Explaination / Solution:
DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.
DNA is extracted from a biological sample. STR analysis is incredibly sensitive so it only needs a tiny amount of someone’s DNA to produce an accurate result. As a result the DNA can be extracted from a wider range of biological samples, including blood, saliva and hair and body secretion etc.
Q2. Which one is not correct about the function of placenta?
Answer : Option A
Explaination / Solution:
Placenta is a tubular structure through which foetus and uterus of mother is connected. It help in transport of nutrition, respiratory gases and release HCG hormones.
Q3. Human being belongs to the species of
Answer : Option A
Explaination / Solution:
Human belongs to a species of Homo sapiens, where Homo represents genus and sapiens represent specific epithet under the class Mammalia.
Q4. The specialized procedure to form an embryo in laboratory in which a sperm is directly injected into the ovum is called
Answer : Option A
Explaination / Solution:
Intra cytoplasmic sperm injection is a specialized procedure to form embryo in laboratory in which a sperm is directly injected into ovum for fertilisation to form zygote.
Q5. Best method to determine paternity is
Answer : Option B
Explaination / Solution:
DNA paternity testing is the most accurate form of paternity testing possible. If DNA patterns between the child and the alleged father do not match on two or more DNA probes, then the alleged father can be totally ruled out. If the DNA patterns between mother, child, and the alleged father match on every DNA probe, the likelihood of paternity is 99.9 percent.
Q6. The type of placenta found in human beings is
Answer : Option B
Explaination / Solution:
Foetus is attached to uterine wall by placenta. It is a disc-shaped having a number of finger-like chorionic villi. This kind of placenta is called discoidal placenta.
Q7. 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.
Q8. 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.
Q9. 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.
Q10. 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.
