Questions
Which of the following statements about the genetic disorders is correct?
- Mongolism is more common in children born to younger women.
- Prenatal genetic disorders can be found out by amniocentesis.
- Non-disjunction of chromosomes during oogenesis is more frequent in younger women.
- In phenylketonuria, the infant suffers from acute damage of the brain and the spinal cord.
In tissue culture, which of the following are true for a suspension culture?
A. Suspension culture consists of single cells and small groups of cells.
B. They must be constantly agitated at 100 to 250 rpm (revolutions per minute).
C. Suspension culture is maintained in a medium usually gelled with agar.
D. The cultures grow in 2 to 3 weeks.
E. Usually, the medium has the auxin 2,4-D.
- A, B and E
- A, B and C
- A and D
- B and C
Which of the following statements is/are correct?
(1) Plants developed through suspension cultures generally exhibit genetic variations.
(2) Plants regenerated via organogenesis from callus cultures generally do not exhibit genetic variations.
- Only (2)
- Only (1)
- Both (1) and (2)
- Neither (1) nor (2)
The stage of the life cycle of malarial parasite Plasmodium vivax which is passed in female Anopheles is
- formation of gametocytes
- pre-erythrocytic schizogony
- exoerythrocytic schizogony
- formation of sporozoites
The major similarities between spirochete and spirillum are
A. Presence of flagella for motility
B. Cell with squiggle shape
C. Pathogenic mode of habit
D. Both have approximately same size
E. Both belong to Order spirochetales
- A and D
- D and E
- B and E
- A, B, C and E
The double stranded DNA virus is
- Avulavirus
- Morbillivirus
- Bacteriophage Mu
- Henipaviruses
RNA retroviruses have a special enzyme that
- translates host DNA
- disintegrates host DNA
- polymerizes host DNA
- transcribes viral RNA to c-DNA
Which of the following viruses causes the green monkey disease?
- Marburg virus
- Ebola virus
- Mumps virus
- Rubulavirus
Directions: The following question has four choices out of which ONLY ONE is correct.
The major mechanism of HER-2/neu oncogene activation in breast cancer is
- point mutation
- translocations
- deletion
- gene amplification
The commercial production of drugs from alcohol is possible by using a fungus called
- Rhizopus stolonifer
- Saccharomyces cerevisiae
- Penicillium notatum
- Mucor indicus
Steroid diosgenin obtained from a yam (Dioscorea) is used to make an
- anti-fertility pill
- anti-coagulant
- anti-AIDS drug
- anti-cancer drug
Which of the following leptospiral infections is caused by Leptospira pomona?
- Weil's disease
- Canicola fever
- Swineherd's disease
- Seven day fever