The technique called gamete intra-fallopian transfer (GIFT) is recommended for those females
who cannot produce an ovum
who cannot retain the foetus inside uterus
who cervical canal is too narrow to allow passage for the sperms
who cervical canal is too narrow to allow passage for the sperms
Bacillus thuringiensis forms protein crystals, which contain insecticidal protein
binds with epithelial cells of midgut of the insect pest ultimately killing it
is coded by several genes including the gene cry
is acitvated by acid of pH of the foregut is the insect pest
is acitvated by acid of pH of the foregut is the insect pest
Which one of the following pairs is wrongly matched while the remaining three are correct?
Penicillium - Conidia
Water hyacinth - Runner
Bryophyllum - Leat buds
Bryophyllum - Leat buds
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
Sparrow
Lion
Goat
Goat
Both, hydrarch and xerarch successions lead to
medium water conditions
xeric conditions
highly dry conditions
highly dry conditions
What happens during fertilisation in humans after many sperms reach close to the ovum?
Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
All sperms excepts the one nearest to the ovum lose their tails
Cells of corona radiata trap all the sperms excepts one
Cells of corona radiata trap all the sperms excepts one
About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH surge) normally occurs?
14th day
20th day
5th day
5th day
Read the following statement having two blanks (1 and 2).
A drug used for ..... (1) ...... patients is obtained from a species of the organism ....... (2).....The one correct option for the two blanks is.
Blank – 1
|
Blank – 2
|
Heart
|
Penicillium
|
Blank – 1 |
Blank – 2 |
Organ - transplant |
Trichoderma |
Blank – 1 |
Blank – 2 |
Swine flu |
Monascus |
Blank – 1 |
Blank – 2 |
Swine flu |
Monascus |
Silencing of mRNA has been used in producing transgenic plants resistant to
bollworms
nematodes
White rusts
White rusts
B.
nematodes
RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence. This method involves silencing of a specific mRNA due to a complementary ds RNA molecule that binds to an prevents translation of the mRNA (silencing). The source of the complementary RNA could be from an infection by viruses having RNA genome of mobile genetic elements (transposons) that replicate via an RNA intermediate. Using Agrobacterium vectors, nematode -specific genes were introduced into the host plant. The introduction of DNA was such t hat it produced both sense and anti -sense RNA in the host cells. These two RNA's being complementary to each other formed a dsRNA that initiated RNAi and thus, silenced the specific mRNA of the nematode. The result was that the parasite could not survive in a transgenic host expressing specific interfering RNA. The transgenic plant, therefore, got itself protected from the parasite.
Consider the following statements ( I - IV) about organic farming.
I. Utilises genetically modified crops like Bt cotton
II. Uses only naturally produced inputs like compost.
III. Does not use pesticides and urea
IV. Produces vegetables rich in vitamins and minerals.
(II), (III) and (IV)
(III) and (IV) only
(II) and (III) only
(II) and (III) only