Biology - Online Test
Q1. Absence of menstruation during period of intense lactation following parturition is called as
Answer : Option A
Explaination / Solution:
During intense lactation just after the delivery the menstrual cycle get stopped and there is no chance of pregnancy. This absence of menstruation is called lactational amenorrhea.
Q2. Removal of RNA polymerase III from nucleoplasm will affect the synthesis of
Answer : Option B
Explaination / Solution:
During transcription of m-RNA, removal of RNA polymerase III form nucleoplasm will affect the synthesis of t-RNA. The t-RNA transfers the amino acids to the site of translation to form protein.
Q3. Five oogonia yield 10 primary oocytes, then how many ova are produced on completion of oogenesis?
Answer : Option B
Explaination / Solution:
Each oogonium produces one ovum at the end of oogenesis process and three polar bodies. Thus, five oogonia will produce five ova at the completion of oogenesis process.
Q4. Jhum cultivation refers to
Answer : Option A
Explaination / Solution:
Jhum cultivation refers to tribal method of shifting cultivation by clearing forest for agriculture again and again. It is an act of deforestation.
Q5. In meiosis
Answer : Option D
Explaination / Solution:
Meiosis cell division consists of two phases. First phase is called meiosis I during which number of chromosome reduce to half the number in parent cells. In meiosis II chromosome number remain same.
Q6. In which condition gene ratio remains constant in a species?
Answer : Option A
Explaination / Solution:
Gene ratio remains constant in species having random mating. Gene flow, mutation and sexual selection are the factors that change the gene ratio of the population.
Q7. Larger animals like birds and mammals are usually stuffed and preserved in
Answer : Option D
Explaination / Solution:
Larger animals like birds and mammals are usually stuffed and preserved in museum. Hence, the correct choice is Museum.
Q8. Birth control measure should be
Answer : Option D
Explaination / Solution:
Good birth control measure should be easily available and cheaper. There should be not interference with sexual desire without any side effect.
Q9. Production of a human protein in bacteria by genetic engineering is possible because
Answer : Option C
Explaination / Solution:
Human protein can be produced in bacteria by genetic engineering because genetic code is universal i.e. same codon in different organism’s code for same amino acids.
Q10. Identify the false statement out of the following
Answer : Option C
Explaination / Solution:
Androgen hormone is produced from leydig cells. Sertoli cells provide nutrition to spermatozoa or sperm and menstrual cycle get stopped during pregnancy.
