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MCQ is Multiple Choice Qustions. There are 18 questions, it may seem alot but its not really. For each question the answer is either A, B, C or D and ONLY one option is correct per question. It would mean the world to me if somebody can help answer some questions!!
Q1. Developmental genes are
(a)usually highly variable
(b)never expressed
(c)highly conserved
(d)found in the mitochondrial genome.
Q2. In development, patern formation is controlled by
(a) homeopathic genes
(b)homeotic genes
(c)homolytic genes
(d)homeostatic genes.
Q3. The expotential model of growth
(a)describes a population whose growth is unlimited
(b)incorporates the concept of carrying capacity
(c)described by a sigmoidally shaped curve
(d)exhibited by paramecium grown in the lab with limited nutrients
Q4. In ecology, density independent pop. growth
(a)results from decreased fecundity
(b)is associated with crowded pops.
(c)results from competition for resources
(d)may be associated with stochastic events
Q5. Predation of one species on another is
(a) detrimental to both species
(b)beneficial to one, detrimental to the other
(c)beneficial to both
(d) beneficial to one, but the other is unaffected
Q6. Which is NOT associated with competition
(a)realized niche
(b)resource partitioning
(c)charater displacement
(d) aposematic colouration
Q7. Hormones act in a tissue specific manner because
(a)endocrine glands affect only nearby tissue
(b) hormones are carried in blood to only specific tissues
(c)different tissue differ in hormone receptors and intracellular effector proteins
(d)hormones are transported in axons to specific tissues.
Q8. An unequal distribution of ions inside/outside a nerve cell is essential for generating its resting membrane, at rest there is a
(a)higher concentration of K+ inside the cell
(b)higher conc. of K+ outside the cell
(c) a higher conc. of Na+ inside the cell
(d) a higher conc. of Cl- inside the cell
Q9. In nerve cells the stimulus aptitude is encoded in the
(a)size of action potential
(b)frequency of action potentials
(c)duration of action potentials
(d)resting membrane potential
Q10. Hair cells in the inner ear are activated by
(a)attachment to the middle ear bones
(b)vibrating fluid in the inner ear
(c)attachment to the tympanum
(d)by hair like extensions from adjacent cells
Q11. Motorneurons stimulate muscle cells by
(a) transmission of action potentials via electrical synapse
(b)release of GABA
(c)release of acetylcholine
(d)release of Na+
Q12. What is the function of extracellular digestion(a)mechanical digestion(b)chemical digest.(c)nutrient absorption(d)food moistening and storage
Q13. An osmoregulator that can only tolerate a narrow range of salinities is called
(a)euryhaline
(b)stenohaline
(c)hypoosmotic
(d)hyperosmotic
Q14. Macrophages are
(a)giant cells that eat viruses for nutrient supply
(b)phagocytizing cells that differentiate from monocytes outside the blood stream
(c) cells that can remember what has been phagocytized previously for enhanced secondary response
(d)unicellular parasites that phagocytose our cells
Q15. Humans can make billions of different antibodies, but the human genome encodes just 25,000 genes, how is it possible
(a)antibodies are custom produced against all pathogens
(b)each individual antibody evolves through its lifespan differently
(c)somatic recombination of DNA enables each lymphocyte to produce a different antibody
(d)many gene fragments encode different antibodies
Q16. Which of the following is true of the complement system
(a)its is only part of adaptive immunity
(b)it is only part of innate immunity
(c)it belongs neither to innate or adaptive immunity but forms part of passive immunity
(d)its an effector mechanism of both innate and adaptive immunity
Q17. What is immunoglobulin g IgG
(a)an antibody that can cross the placenta
(b)an antibody that is primarily found in secretions of breast milk
(c)a pentameric antibody that is the 1st to be secreted following infection
(d)a globular protein that carries macrophages to their targets
Q18. What is clonal expansion? It is the
(a)proliferation of individual monocytes following antigen stimulation
(b)proliferation of individual granulocytes following antigen stimulation
(c)proliferation of individual lymphocytes follwing antigen stimulation
(d)the growth of genetically identical red blood cells