Biology - Online Test
Q1. The first human-like creature being the hominid was called
Answer : Option A
Explaination / Solution:
The first human like creature being hominid was called Homo habilis. Their brain capacity were about 650-800cc and probably do not eat meat.
Louis Leakey, the British-Kenyan paleoanthropologist who was the first to suggest the existence of H. habilis, and his wife, Mary Leakey, found the first trace of H. habilis in 1955: two hominin teeth.
Q2. The sensitivity of fingerprinting technique has been increased by use of
Answer : Option C
Explaination / Solution:
The sensitivity of fingerprinting technique has been increased by use of Polymerase chain reaction (PCR). After that single cell obtained from organism is enough for this technique.
Q3. Inner cell mass (embryo) contain certain cells that contain cells called stem cells which have potency to
Answer : Option A
Explaination / Solution:
The inner cell mass contain certain cells that contain cells called stem cells which have potency to give rise all the tissues and organs. Now a day’s stem cells are preserved for future use.
Q4. Which of the following sentences is true about the evolutionary process?
Answer : Option A
Explaination / Solution:
Evolutionary process is totally different from human progress.
Evolution leads to creation of complex organism. It does not lead to creation of better organism. For e.g, we are not better than the amoeba, we are just complex than amoeba.
There is no real progress in the idea of evolution which is biologically controlled to creation of variation.
Q5. 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.
Q6. 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.
Q7. 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.
Q8. 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.
Q9. 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.
Q10. 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.
