Multiple Choice QuestionsSelect the correct statements with respect to diseases and immunisation
if due to some reason B and T - lymphocytes are damaged, the body will not produce antibodies against a pathogen
injection of dead/inactivated pathogens causes passive immunity
certain protozoans have been used to mass produce hepatitis B vaccine
certain protozoans have been used to mass produce hepatitis B vaccine
In history of biology, human genome project led to the development of
biotechnology
biomonitoring
bioinformatic
bioinformatic
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
Two X - chromosomes
Only one Y- chromosomes
Only one X - chromosome
Only one X - chromosome
Which one of the following techniques made it possible to genetically engineer living organism
Recombinant DNA techniques
X -ray diffraction
Heavier isotope labelling
Heavier isotope labelling
Ureters act as urogenital ducts in
humans males
human females
frog's both males and females
frog's both males and females
Read the following four statements (I - IV) about certain mistakes in two of them
I .The first transgenic buffalo, Rosie produced mile which was human alpha - lactal bumin enriched
II. Restriction enzymes are used in isolation of DNA from another macro -molecules.
III. downstream processing is one of the steps of R-DNA technology.
IV. Disarmed pathogen vectors are also used in the transfer of R - DNA into the host.
Which are the two statements having mistakes?
Statement (II) and (III)
Statements (III) and (IV)
Statements (I) and (III)
Statements (I) and (III)
Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?
Yeast - statins
Acetobacter aceti - acid
Clostridium Butulicum - lactic acid
Clostridium Butulicum - lactic acid
The logistic population growth is expressed by the equation
dN/dt = rN
dN/dt = rN
B.
A population growing in a habitat with limited resources show initially a lag phase, followed by phases of acceleration and deceleration and finally an asymptote when the population density reaches the carrying capacity. A plot of N (population density at time t) in relation to time (t) results in the sigmoid curve. This type of population grown is called Verhulst -pearl Logistic Growth and is describes by the following equation:
where N = population density at time t,
r = Intrinsic rate of natural increase
K = carrying capacity
Since resources for growth for most animal populations are finite and become limiting sooner or later, the logistic growth model is considered a more realistic one.
Examine the figure below and select the right option giving all the four part (A, B,C and D) correctly identified.
|
A |
B |
C |
D |
|
Archegoni Ophore |
Female thallus |
Gemma cup |
Rhizoids |
|
A |
B |
C |
D |
|
Archegoni |
Female thallus | Bud | Foot |
|
A |
B |
C |
D |
|
Seta |
Sporophyte | Protonema | Rhizods |
|
A |
B |
C |
D |
|
Seta |
Sporophyte | Protonema | Rhizods |
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