1. In genetics, the Reverse transcriptase helps in which among the following transcriptions?
[A] Single stranded DNA into double stranded DNA
[B] Single stranded RNA into double stranded DNA
[C] Single Stranded RNA into double stranded RNA
[D] Double Stranded DNA into single stranded RNA
Show Answer
Correct Answer: B [Single stranded RNA into double stranded DNA]
Notes:
Reverse transcriptase helps in Single Stranded RNA into double stranded RNA transcriptions. Reverse transcriptase (RT), also known as RNA-dependent DNA polymerase. It is used to generate complementary DNA (cDNA) from an RNA template.
2. Out of Diphtheria, Whooping cough, Typhoid , Diarrhea & Malaria which is not caused by bacteria?
[A] Whooping Cough
[B] Typhoid
[C] Malaria
[D] None of the above
Show Answer
Correct Answer: C [Malaria]
Notes:
Malaria (It is a disease caused by Protozoa Plasmodium family)
3. Which among the following plays a role in production of alcohol in beer?
[A] Bacteria
[B] Protozoan
[C] virus
[D] Yeast
Show Answer
Correct Answer: D [Yeast]
Notes:
Yeast plays a role in production of alcohol in beer. Yeast is a little, single-cell organism and is one of the simplest forms of plant life. It is responsible for the fermentation process in beer.
4. Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are _________ ?
[A] Proteins
[B] Lipids
[C] glycoproteins and gycolipids
[D] None of the above
Show Answer
Correct Answer: C [glycoproteins and gycolipids]
Notes:
Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are glycoproteins and glycolipids. Lipid and proteins on the cell membrane surface often have short carbohydrate chains protruding out from the cell surface which are known as glycolipids and glycoproteins.
5. Japanese encephalitis is a disease caused by __ ?
[A] Virus
[B] Protozoa
[C] Bacteria
[D] Fungi
Show Answer
Correct Answer: A [Virus]
Notes:
Japanese encephalitis is caused by virus from the family Flaviviridae. It’s a Mosquito Borne Disease
6. Which among the following is correct about Saliva of a Healthy Human?
[A] It is slightly acidic
[B] It is slightly saline
[C] It is slightly alkaline
[D] It is neutral
Show Answer
Correct Answer: C [It is slightly alkaline]
Notes:
pH stands for potential hydrogen. It is used to describe the chemical acidity level vs. alkalinity level of a substance. The pH of Healthy human saliva is slightly alkaline and in the range of 6.2 to 7.6.
7. The nutritional supplements Spirulina, Chorella and the Vitamin-C supplement, Dunaliella are actually :
[A] Algae
[B] Lichens
[C] Probiotics
[D] Bryophytes
Show Answer
Correct Answer: A [Algae]
Notes:
The nutritional supplements Spirulina, Chorella and the Vitamin-C supplement, Dunaliella are actually unicellular algae that are commercially produced worldwide. These algae are concentrated sources of carotenoids (especially provitamin A carotenoids) and other nutrients.
8. Which of the following is responsible for exchange of carbon dioxide for oxygen in the lungs?
[A] Alveoli
[B] Pharynx
[C] Tendons
[D] Duodenum
Show Answer
Correct Answer: A [ Alveoli ]
Notes:
Alveoli are tiny sacs in our lungs. The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs.
9. In humans, fertilization normally occurs in __?
[A] Ovary
[B] Fallopian Tube
[C] Uterus
[D] Placenta
Show Answer
Correct Answer: B [ Fallopian Tube]
Notes:
In humans, fertilization normally occurs in the fallopian tube. The ovary is the female gonad that contains the eggs. The uterus is the organ that houses the developing embryo. The placenta is the structure that nourishes the embryo.
10. Which of the following at the opposite of micropylar end represents the basal part of the ovule?
[A] Hilum
[B] Nucellus
[C] Chalaza
[D] Funicle
Show Answer
Correct Answer: C [Chalaza]
Notes:
The chalaza is a structure inside bird and reptile eggs and plant ovules. It attaches or suspends the yolk or nucellus within the larger structure. It represents the basal part of the ovule.
