Biology - Online Test
Q1. Picture shown below is example of:-
Answer : Option B
Explaination / Solution:
Wolf and Tasmania Wolf are examples of convergent evolution of placental mammals and Australian marsupials. They are evolved differently due to different in climatic and geographic regions.
Q2. Cryptorchidism is a condition in which
Answer : Option C
Explaination / Solution:
Cryptorchidism is a condition in which testis do not descend into scrotal sac. Formation of sperms inside the testis require 2-3 degree less temperature than body temperature.
Q3. State the use of molecular medicine?
Answer : Option C
Explaination / Solution:
The application of the power of molecular genetics to the problems of human disease plays an important role in many of the research programs in the Department of Biology.
Several complementary approaches are used by our research groups. The power of genomic analysis is used to identify, isolate and characterize genes which cause and contribute to the etiology of human diseases.
Human disease is also studied through the functional analysis of key genes: low density lipoprotein receptors in atherosclerosis and stroke; a broad spectrum of tumor suppressors and oncogenes in cancer, genes directly leading to the disease etiology in neuromuscular disorders such as Alzheimer's, Huntington's disease, and muscular dystrophies.
Q4. Which of the following arise from endoderm?
Answer : Option B
Explaination / Solution:
Human body is triploblastic, having three layered embryo. The outer layer is called ectoderm, the middle layer is called mesoderm and inner most layer is called endoderm that forms lungs and other vital organs.
Q5. Statement I: When more than one adaptive radiation appeared in isolated geographical area it called a convergent evolution.
Statement II: Bats and birds are example of adaptive radiation.
Statement III: Tiger cat, kangaroo, wombat and sugar gliders are example of Australian marsupials.
Statement II: Bats and birds are example of adaptive radiation.
Statement III: Tiger cat, kangaroo, wombat and sugar gliders are example of Australian marsupials.
Answer : Option B
Explaination / Solution:
When more than one adaptive radiation appeared in isolated geographical area it called a convergent evolution. Tiger cat, kangaroo, wombat and sugar gliders are example of Australian marsupials.
Q6. First test-tube baby born in July,1978 was
Answer : Option C
Explaination / Solution:
First test-tube baby was born in July,1978 named Louise Brown. Test tube baby programme involve in vitro fertilisation of ovum and transplanting it in fallopian tube or uterus.
Q7. Gel electrophoresis is used for
Answer : Option A
Explaination / Solution:
Gel electrophoresis is used to separate macromolecules like DNA, RNA and proteins. DNA fragments are separated according to their size and proteins can be separated according to their size and their charge (different proteins have different charges) to study the genome of individual organism.
Q8. The embryo development from the somatic cells is called
Answer : Option A
Explaination / Solution:
Embryo develops from the fusion of sperm and ovum. The zygote divides mitotically to form embryo. Sometimes other somatic diploid cells act as embryo. They are called embryoid.
Q9. Assertion: When migration of a section of population to another occurs, gene frequencies change in the original as well as in the population.
Reason: There would be a gene flow if this gene migration happens multiple times.
Reason: There would be a gene flow if this gene migration happens multiple times.
Answer : Option C
Explaination / Solution:
gene flow (also known as gene migration) is the transfer of genetic variation from one population to another. If the rate of gene flow is high enough, then two populations are considered to have equivalent genetic diversity and therefore effectively a single population.
Q10. Female hired to develop the in-vitro fertilized egg of another female to maturity is called
Answer : Option A
Explaination / Solution:
Sometimes egg of female and sperm of male are able to produce but fallopian tube is either blocked or uterus is not capable of implantation. In this case, ovum collected from female and sperm collected from male is fertilized and transferred to another female called surrogate mother for further development.
