MCQ’S ON EMBRYOLOGY
1. This phase in the development of sperm has no counterpart in ovum-development
(a) spermiogenesis
(b) phase of multiplication
(c) phase of growth
(d) polar body formation
Answer: (a)
2. During this phase, the nuclear envelope begins to disappear
(a) cytokinesis
(b) S phase
(c) Anaphase
(d) Prometaphase
Answer: (d)
3. In humans, the number of ova and sperms that would be produced from 100 secondary oocytes and 100 secondary spermatocytes during gametogenesis is
(a) 50 ova, 100 sperms
(b) 100 ova, 100 sperms
(c) 100 ova, 200 sperms
(d) 200 ova, 200 sperms
Answer: (c)
4. The undifferentiated primordial germ cells are larger in size and their chromatin rich nuclei are distinct in
(a) growth phase
(b) multiplication phase
(c) maturation phase
(d) all of these
Answer: (b)
5. Spermatogenesis and oogenesis describe the process of meiosis in males and females, respectively. This statement about both processes is true
(a) both are halted in an intermediate step until puberty
(b) both produce the same number of viable gametes
(c) oogenesis produces a larger gamete than spermatogenesis
(d) oogenesis forms two polar bodies, spermatogenesis forms only one
Answer: (c)
6. Typically, in humans, gametes are disease-free or even in other animals as
(a) gametes are immune to diseases
(b) germs cannot attack gametes
(c) germplasm is segregated easily and not subjected to diseases from which somatic cells may suffer
(d) none of these
Answer: (c)
7. Phenomena that creates female gametes, oogenesis is ceased at prophase I up till puberty. This describes the DNA content of a female’s gametes during her childhood.
(a) 23 chromosomes, 23 chromatids
(b) 23 chromosomes, 46 chromatids
(c) 46 chromosomes, 92 chromatids
(d) 46 chromosomes, 46 chromatids
Answer: (c)
8. The amount of yolk and its distribution are changed in the egg. This is affected
(a) ferrilization
(b) cleavage pattern
(c) zygote formation
(d) number of blastomeres
Answer: (b)
9. Haemoendothelial placenta takes place in
(a) rat and rabbit
(b) camel and deer
(c) goat and cow
(d) ape and man
Answer: (a)
10. Atretic follicles occur in
(a) Liver
(b) Testis
(c) Thymus
(d) Ovary
Answer: (d)
MCQ’S ON TISSUE CULTURE
1. Which of the following statement is incorrect about agar?
(a) Remains stable at incubation temperature
(b) Does not react with media constituents
(c) Does not use in micropropagation work
(d) Not digested by plant enzymes
Answer: (c)
2. In tissue culture system, this is the main effect of cytokines
(a) shoot elongation
(b) adventitious root formation
(c) induction of somatic embryos
(d) adventitious shoot formation
Answer: (d)
3. This is not a basic component of culture media for plant cultivation
(a) amino acids
(b) sucrose/sugar
(c) a complex mixture of salts
(d) serum albumin
Answer: (d)
4. Which of the following plant propagation method uses girdling?
(a) cuttings
(b) grafting
(c) layering
(d) both (a) and (b)
Answer: (c)
5. The ability of single cells to divide and produce all differentiated cells in the entity.
(a) Totipotency
(b) Multipotent
(c) Pluripotent
(d) Unipotent
Answer: (a)
6. Which of the following is the first transgenic crop?
(a) flax
(b) tobacco
(c) plastic
(d) cotton
Answer: (b)
7. Which of the following is not a feature of plant cells?
(a) Consists of plastids
(b) Cell wall outside the cell membrane
(c) Presence of centrioles
(d) Cell-cell communication through plasmodesmata
Answer: (c)
8. Which of the following is a superbug?
(a) virus
(b) bacteria
(c) transgenic plant
(d) worms
Answer: (b)
9. This is a cellular totipotency property.
(a) plants
(b) animals
(c) virus
(d) none of the above
Answer: (a)
10. Growth of plant tissues in artificial media is called _______.
(a) cell hybridization
(b) plant tissue culture
(c) transgenesis
(d) gene expression
Answer: (b)
MCQ’S ON CYTOSKELETON
1. This statement is true
(a) microtubules are composed of tubulin
(b) microfilaments are composed of actin
(c) intermediate filaments are resistant to cytochalasin-B and colchicine
(d) all the above
Answer: (d)
2. What are flagella and cilia of eukaryotic cells made of?
(a) tubulin
(b) desmin
(c) lamin
(d) keratin
Answer: (a)
3. Cell lining of the lumen of the fallopian tube is involved in ciliary action to transport the egg from the ovary to the uterus. The cytoskeleton structure responsible for this movement is
(a) flagella
(b) microfilaments
(c) microtubules
(d) intermediate filaments
Answer: (c)
4. The intermediate filaments found in hairs and nails are a type 1 IF protein, composed of
(a) tubulin
(b) keratin
(c) vimentin
(d) lamin
Answer: (b)
5. Malformation of these cytoskeleton structures can be linked to an inability to contract a muscle
(a) microfilaments
(b) microtubules
(c) centrioles
(d) intermediate filaments
Answer: (a)
6. This is a microfilament inhibitor
(a) cytochalasin-B
(b) colchicine
(c) cinchonine
(d) aspirin
Answer: (a)
7. This is the most heterogeneous type of cytoskeleton filament
(a) intermediate filaments
(b) microfilaments
(c) microtubules
(d) none of the above
Answer: (a)
8. This cell lacks cytoskeleton
(a) prokaryotic bacterial cells
(b) eukaryotic plant cells
(c) prokaryotic and eukaryotic animal cells
(d) None of the above
Answer: (d)
9. Microfilaments are composed of
(a) mosaic protein
(b) tubulin protein
(c) chitin protein
(d) actin protein
Answer: (d)
10. A network of microfilaments and microtubules is classified as
(a) cytoskeleton
(b) active skeleton
(c) vertebral skeleton
(d) endoplasmic skeleton
Answer: (a)
