General Science - Online Test
Q1. Depending on base composition, length of segment and number of repetitive units, the satellite DNA is classified into many categories such as
Answer : Option A
Explaination / Solution:
Satellite DNA contains short nucleotide sequences repeated thousands of time tandemly. Satellite DNA is divided into different categories according to their size i.e., micro-satellites, mini-satellites etc.
- Micro-satellite consists of 2 – 6 bp repeats.
- Mini-satellite consists of 10 – 100 bp repeats, they are referred as VNTRs.
These sequences generally do not code for any protein.
Q2. Mitotic division in zygote as it moves through the isthmus of oviduct is called
Answer : Option A
Explaination / Solution:
Zygote undergoes mitotic division as it moves through the isthmus of oviduct by cleavage to form 2, 4,8,16 blastomeres.
Q3. 1 lac people attended the rally addressed by the Prime Minister in Delhi and 2 Lakh in Mumbai. These statistics are based on
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. Which of the following statements are correct?
Answer : Option C
Explaination / Solution:
Fullerence have cage like spheroidal molecular ( C60) structure and have no dangling bonds.
Q5. The difference between Homo sapiens and the Homo erectus was
Answer : Option B
Explaination / Solution:
Home sapiens and Homo erectus in differ in their size of brain capacity. The size of brain of Homo erectus was smaller than Homo sapiens.
The average brain size of Homo erectus is estimated to have been roughly 900 cubic centimeters whereas the average brain size capof Homo sapiens is roughly 1300 cubic centimeters.
Q6. DNA fingerprinting is the basis of paternity testing in case of dispute because
Answer : Option D
Explaination / Solution:
Polymorphism is variation at genetic level which occurs due to mutation. Polymorphisms are inheritable from parent to children without any changes so DNA fingerprinting is the basis of paternity testing.
Q7. Finger-like projections appear on the trophoblast after implantation is called
Answer : Option C
Explaination / Solution:
After implantation of blastocysts, finger-like projections appear on the trophoblast called chronic villi which is surrounded by the uterine tissue and maternal blood.
Q8. Which of the following will give quantitative data
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. Regular use of which of the following fertilizers increases the acidity of the soil?
Answer : Option C
Explaination / Solution:
Ammonium sulphate addition increases acidity in the soil.
In the presence of water and oxygen in the soil, ammonium and sulfate are decomposed by naturally occurring microbes. During this process, acids are released into the soil, along with nitrogen and sulfur compounds.
Q10. 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.
