Zoology - Online Test
Q1. DNA fingerprinting or genetic finger printing is the process of
Answer : Option C
Explaination / Solution:
VNTR analysis (sometimes called DNA fingerprinting) can be used to identify and match cell samples.
In order to use VNTRs, we must have a source of DNA. The DNA can come from any nucleated cell, e.g., white blood cells, skin samples, semen samples, or hair folicles. Red blood cells cannot be used as they do not have a nucleus.
For a VNTR analysis, the DNA is extracted and cut using restriction endonucleases. A Southern Blot is then performed using various probes.
Q2. Which of the following is formed first out of the following in growing foetus
Answer : Option A
Explaination / Solution:
The heart is formed first in foetus after one month of pregnancy. Limbs and digits after second months, limbs and external genital organs after three months and eye lids and hair after six months.
Q3. Homo sapiens arose in Africa and moved across continents and developed into distinct races during
Answer : Option B
Explaination / Solution:
Homo sapiens arose in Africa and moved across continentsand developed into distinct races. During ice age between 75,000-10,000 years ago modern Homo sapiens arose. Pre-historic cave art developed about 18,000 years ago. Agriculture came around 10,000 years back and human settlements started.
Q4. Typically DNA content of about 100000 cells or 1 microgram is required for fingerprinting. If the sample obtained is less it is increased by
Answer : Option C
Explaination / Solution:
Amplification is a mechanism leading to multiple copies of a chromosomal region within a chromosome arm.
The DNA amplification technique of the polymerase chain reaction (PCR) is a laboratory method for creating multiple copies of small segments of DNA.
Q5. Which of the following group of hormones are produced during pregnancy?
Answer : Option A
Explaination / Solution:
Human chorionic gonadotropin (hCG), human placental lactogens (hCL) and relaxin are produced in human females only during pregnancy.
Q6. Modern Homo sapiens arose during ice age between
Answer : Option B
Explaination / Solution:
Homo sapiens arose in Africa and moved across continentsand developed into distinct races. During ice age between 75,000-10,000 years ago modern Homo sapiens arose.
Q7.
Statement I: DNA finger printing is highly reliable method of identification of individual involved in crimes.
Statement II: DNA a fingerprinting is a sure method in solving paternity and maternity disputes.
Statement III: DNA fingerprinting can be used to cure HIV infection.
Answer : Option C
Explaination / Solution:
DNA finger printing is highly reliable method of identification of individual involved in crimes. DNA a fingerprinting is a sure method in solving paternity and maternity disputes.DNA fingerprinting cannot be used to cure HIV infection.
Q8. Parturition occurs due to release of hormone oxytocin that cause
Answer : Option C
Explaination / Solution:
Oxytocin hormone is released by foetal ejection reflex from maternal pituitary gland that causes stronger and stronger uterine contraction that leads to ejection of baby through birth canal.
Q9. Human settlement started around 10, 000 years ago due to starting of
Answer : Option D
Explaination / Solution:
Agriculture came around 10,000 years back and human settlements started. After starting of agriculture, the human civilization started the grows and decline many times.
Q10. The hybridization of probes having radioactive isotopes with various sequence of nitrogen bases with ssVNTR is called
Answer : Option C
Explaination / Solution:
A Southern blot is a method used in molecular biology for detection of a specific DNA sequence in DNA samples. Southern blotting combines transfer of electrophoresis-separated DNA fragments to a filter membrane and subsequent fragment detection by probe hybridization.
