1. Amino acids join together to make polypeptides. What polypeptides make by joining together?
[A] Carbohydrates
[B] proteins
[C] vitamins
[D] All the above
Show Answer
Correct Answer: B [proteins]
Notes:
Proteins are made up of chains of amino acids bound by bonds called peptide bond. There are some 22 different known amino acids which can compose proteins. There may be many more unknown to us.
2. Which among the following in Human Heart is / are responsible for contractions that send the blood through the circulation?
[A] Left Atrium
[B] Both Atria
[C] Right Ventricle
[D] Both Ventricles
Show Answer
Correct Answer: D [Both Ventricles]
Notes:
Each half of the heart has two chambers: an atrium, and a lower chamber called the ventricle. The function of the ventricles is to pump blood into systemic and pulmonary circulations.
3. Which among the following cells is capable to develop in any of the type of cell?
[A] Endothelial
[B] Endodermal
[C] Stem
[D] None of the above
Show Answer
Correct Answer: C [Stem]
Notes:
A stem cell is a cell with the unique ability to develop in any of the type of cell. In the future they may be used to replace cells and tissues that have been damaged or lost due to disease.
4. “Karnal bunt” is a disease found in which if the following cereals?
[A] Rice
[B] Wheat
[C] Maize
[D] Pulses
Show Answer
Correct Answer: B [Wheat]
Notes:
Karnal bunt is a fungal disease of wheat, durum wheat, and triticale. T. indica is the fungal pathogen causing Karnal bunt of wheat seeds. Its distribution is mainly limited to northwest India and adjoining countries.
5. What would be the percentage of Glucose in the Urine of a healthy person?
[A] less than 1%
[B] More than 1%
[C] More than 0.1%
[D] 0%
Show Answer
Correct Answer: D [0%]
Notes:
The percentage of Glucose in the Urine of a healthy person is zero. A higher measurement could be a sign of a health problem. Diabetes is the most common cause of elevated glucose levels in humans.
6. Brachytherapy is commonly used as an effective treatment for cervical, prostate, breast, and skin cancer in many parts of the world. Why Brachytherapy is an offshoot of which among the following forms of Cancer Treatment?
[A] Radiotherapy
[B] Chemotherapy
[C] Surgery
[D] None of them,
Show Answer
Correct Answer: A [Radiotherapy]
Notes:
Brachytherapy is commonly used as an effective treatment for cervical, prostate, breast, and skin cancer in many parts of the world. Brachytherapy is an offshoot of Radiotherapy.
7. What do we call the roots of some orchid plants, which hang in the air and absorb moisture from it?
[A] Assimilatory Roots
[B] Epiphytic Roots
[C] Sucking Roots
[D] Stilt Roots
Show Answer
Correct Answer: B [ Epiphytic Roots]
Notes:
Epiphytic roots are the roots of some orchid plants, which hang in the air and absorb moisture and nutrients from the air, rain water. Examples of epiphytic roots are mosses, liverworts, lichens, and algae of temperate zone and ferns, cacti, orchids, and bromeliads in the tropics.
8. In which of the following situations the Identical twins are born?
[A] Two sperms fertilise one ovum
[B] Two sperms fertilise two ovums simultaneously
[C] One sperm fertilises the ovum and zygote divides into two separate cells developing independently
[D] One sperm fertilises two ovums
Show Answer
Correct Answer: C [One sperm fertilises the ovum and zygote divides into two separate cells developing independently]
Notes:
Identical twins form when one egg has been fertilised by one sperm and the zygote splits into two. This happens at the very earliest stage of development, when the zygote is no more than a cluster of a few cells. If this egg then splits into two, an identical twin pregnancy can result.
9. Which of the following is done by an Antigen? (UPSC Prelims 1997)
[A] Lowers body temperature
[B] destroys harmful bacteria
[C] triggers the immune system
[D] is used as an antidote to poison
Show Answer
Correct Answer: C [triggers the immune system]
Notes:
An antigen is any substance that causes your immune system to produce antibodies against it. An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen. An antigen may also form inside the body.
10. Which one of the following types of micro-organisms is most widely used in industries? (UPSC Prelims 1998)
[A] Bacteria
[B] Bacteria and fungi
[C] Bacteria and algae
[D] Bacteria, micro-algae and fungi
Show Answer
Correct Answer: D [Bacteria, micro-algae and fungi]
Notes:
Bacteria, micro-algae and fungi are most widely used in industries
