Colostrum, the first milk produced by the mother after childbirth, is rich in IgA antibodies. IgA provides passive immunity to the newborn. IgD, IgE, and IgM do not have this primary role in colostrum.
Q2mcq1 mark
Without altering water quality, __________ is/are an ideal disinfectant used in waste water treatment.
a.
Boiling
b.
U-V rays
Correct Answer
c.
Ozonisation
d.
Chlorination
Step-by-Step AI Explanation
Verified Method
UV rays are considered an ideal disinfectant for water treatment because they destroy microorganisms by damaging their DNA without adding any chemicals, thus not altering the water quality. Chlorination and Ozonisation are chemical treatments that add residues, and boiling consumes significant energy.
Q3mcq1 mark
The ovary remains attached with pelvic wall and the uterus by an ovarian ligament, called :
a.
myometrium
b.
ovarian stroma
c.
mesovarium
Correct Answer
d.
tunica albuginea
Step-by-Step AI Explanation
Verified Method
The ovary is attached to the pelvic wall and uterus by a fold of peritoneum called the mesovarium. Myometrium is a layer of the uterus; ovarian stroma is the inner tissue of the ovary; tunica albuginea is the connective tissue capsule of the ovary.
Q4mcq1 mark
B cells are activated by :
a.
Interferon
b.
Complement
c.
Antigen
Correct Answer
d.
Antibody
Step-by-Step AI Explanation
Verified Method
B cells are lymphocytes that specifically recognize and are activated by the presence of a specific antigen, which leads to their differentiation into plasma cells and production of antibodies.
Q5mcq1 mark
A mRNA molecule is produced by :
a.
Duplication
b.
Replication
c.
Translation
d.
Transcription
Correct Answer
Step-by-Step AI Explanation
Verified Method
Transcription is the biological process where a segment of DNA is copied into RNA (specifically mRNA) by the enzyme RNA polymerase. Replication involves DNA synthesis, while translation is the process of protein synthesis from mRNA.
Q6mcq1 mark
The average foetal heart beat rate is :
a.
120 - 160 beats/minute
Correct Answer
b.
120 - 130 beats/minute
c.
130 - 150 beats/minute
d.
130 - 160 beats/minute
Step-by-Step AI Explanation
Verified Method
The average foetal heart rate typically ranges from 120 to 160 beats per minute. This is a standard physiological benchmark used in clinical assessments.
Q7mcq1 mark
The wings of birds and butterflies is an example of :
a.
Divergent evolution
b.
Variation
c.
Convergent evolution
Correct Answer
d.
Adaptive radiation
Step-by-Step AI Explanation
Verified Method
The wings of birds (vertebrates) and butterflies (insects) perform the same function (flight) but have different embryonic origins (analogous organs). This phenomenon is known as convergent evolution.
Q8mcq1 mark
Modern man belongs to which period ?
a.
Quaternary
Correct Answer
b.
Cambrian
c.
Cretaceous
d.
Silurian
Step-by-Step AI Explanation
Verified Method
Modern man (Homo sapiens) appeared during the Quaternary period, which is the current geological period in the Cenozoic era. Cambrian, Cretaceous, and Silurian are much older periods.
Q9mcq1 mark
The most common substrate used in distilleries for the production of ethanol :
a.
Molasses
Correct Answer
b.
Soyameal
c.
Cornmeal
d.
Groundgram
Step-by-Step AI Explanation
Verified Method
Molasses is the byproduct of the sugar industry and is rich in fermentable sugars, making it the most economical and common substrate for ethanol production in distilleries. Soyameal, cornmeal, and groundgram are primarily protein/starch sources for food or animal feed, not typical primary substrates for large-scale ethanol distillation.
GEAC stands for Genetic Engineering Approval Committee, which is the body under the Ministry of Environment, Forest and Climate Change that makes decisions regarding the validity of research involving genetically modified organisms and the safety of introducing them for public use.
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Match the pathogens with respective diseases caused by them and select the correct match using the codes given below : (A)Leishmania donavani (i)Amoebiasis (B)Wuchereria bancrofti (ii)Kala-azar (C)Trypanosoma gambiense (iii)Sleeping sickness (D)Entamoeba histolytica (iv)Filariasis
a.
(A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
b.
(A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
c.
(A)-(i), (B)-(iv), (C)-(iii), (D)-(ii)
d.
(A)-(ii), (B)-(iv), (C)-(i), (D)-(iii)
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