Aquatic Toxicology (Part-10)

Q1.Any toxicant that affect the motility of sperm will—– success of fettilization??

  1. Directly affect
  2. Not affect
  3. Partially affect
  4. All of these.

Q2.Tributyl tin(TBT) affect on sperm—–which also affect function of sperm?

  1. Movement
  2. Energy production
  3. Ion balance
  4. None of these

Q3.In spermatozoans the interaction of metals with membrane transporters and changes in signaling for motility includes Calcium dependent routes and—–

  1. PCR
  2. ATP
  3. cAMP
  4. CDR

Q4.The toxicity that takes place during development of an organism,is  called??

  1. Developmental toxicity
  2. Lethal toxicity
  3. Sub lethal
  4. Organismal

Q5.There are no toxicants that could be said to affect only development rather the mode of action may be to affect the?

  1. Cell cycle
  2. DNA replication
  3. Membrane behaviour
  4. All of these

Q6.Embryos are considered to be——- senstive to toxicants than adult?

  1. More
  2. Less
  3. None

Q7.Many genes are actively transcribed than adults,cinsequently more DNA is accessible to toxicant which——possibilty of genotoxic affect.

  1. Decrese
  2. Increase
  3. Constant

Q8.The reason,why embryo more senstive than adult?

  1. Cell division greater
  2. Cell division slower
  3. No cell division
  4. None of these

Q9.In embryo,the structure of tissue is being formed the change in structure of tissue have greater affect than effect on?

  1. Genes
  2. Tissues cellular function
  3. Chromosome structure
  4. All of above

Q10.Neurotoxicity,an exposure to a chemical affect function of the—?

  1. Brain
  2. Spinal cord
  3. Nervous system
  4. Endocrine system

Q11.The Neurotoxicity break the?

  1. Neuromuscular junction
  2. Axon of Neuron
  3. Dendrite of Neuron
  4. Cell body

Q12.The transmitors bind to ion,which cause opening of channel in result occur?

  1. Hyperpolarization
  2. Repolarization
  3. Depolarization
  4. None

Q13.Which is the most important neurotranmitter in NM junction is—- which broken down in acetylcholinsterase catalyzed reaction..

  1. DDT
  2. Dalta mathrine
  3. Acetylcholine
  4. All

Q14.Pyrethroids and DDT target sodium channels ——–proper closure?

  1. prevent
  2. Start
  3. None

Q15.Lindane and Dieldrin facilitate exitation by decreasing —–flow?

  1. sodium ions
  2. Potasium ions

GABARGIC chloride flow

  1. Exposure rate of a chemical determined by;
  2. Properties of action               c. mode of toxic action
  3. Ability of organism                 d. all of above 
  4. Biotransformation determines?
  5. Rate of exposure                    b.  categorize toxicity                                     c.  both                                         
  6. chemical that are susceptible to bio transformation?
  7. low molecular weight hydrogen             c. low molecular weight carbon
  8. low molecular weight hydrocarbons      
  9. Biotransformation of chemicals have ……
  10. Long half-life                             b.  Short Half life                                                     c. average life                              
  • Short half life of chemicals in organisms & excreted……….
  • Rapidly                                                  b.  Moderate                                                   c. slowly                                              
  • Short half-life not produce……. effect.
  • Harmful                                                   b. delayed                                                   c.  Both options                                          
  • Short half-life effect of chemicals mostly common in……environment.
  • Artificial aquatic                                  c. natural aquatic                              c. none of above
  • Some toxic effects are;
  • Reversible                                          irreversible                                                  c. both
  • Effect of chemicals may be reversible;
  • Normal repair mechanism                       b. biogenesis mechanism                c. none
  •  Normal repair mechanism, such as
  • Regeneration of tissues                       b. recovery narcosis                                         c. all of these
  • Reversible effect in organism only if it can escape;

a.Toxic medium                               b. toxicant free environment                        c.  all of above

        12.   whish effect is eventually cause death.

             a. reversible                                   b. irreversible                        c. both 

       13. in laboratory effect of reversible & irreversible studied by transferring organism from;

              a. media is toxicant                      b. non toxicant media                 c. both

       14.  laboratory effect of reversible & irreversible studied example is;

              a. recovery                                    b. non recovery                           c. hypothetical

     15. serious damage/injury to organism may be ;

              a. reversible                                 b. irreversible                              c. both right                                                                                             

1: Dose response is a result of

(a) hydration   (b) toxic agents   (c) excess nutrients   (d) none

2: Toxic agents firstly effect on

(a) structure of organism  (b) head of organism   (c) gills of organism   (d) function of organism

3: Magnitude of the effect is proportional to thw amount of

(a) toxicants  (b) water   (c) nutrients   (d) fluids

4: first factor which can b effect the dose

(a) clarity  (b) time   (c) intake  (d) input

5: Types of exposure are:

(a) ingestion   (b) inhalation    (c) dermal absorption   (d) All of these

6: amount of toxic agents and its response can be depended on its

(a) size   (b) measurement   (c) both a & b  (d) none

7: Effect can be measured and quantified in a

(a) simple way   (b) complex way  (c) protrusible way  (d) none

8: toxic agents enter in our body through

(a)inhalation /breath   (b) skin   (c) Both a & b   (d)  none

9: toxic agents can be examined in the presence of

(a) observed response   (b) aquatic organism    (c) health    (d) stress

10: causality is a critical ______ principle

(a)  simple   (b) quantified    (c) toxicological   (d) All

11: which thing that can be change during exposure

(a) Chemical   (b) pheromones  (c) electrons   (d) cells

12: what are aquatic organism which live on?

(a) land     (b) carpets   (c) sand   (d) water

13: causality and response of organism is a variety of

(a) Stresses   (b)  quantity of dose   (c) water   (d) none

14: specificity of the response is related to

(a) area   (b) strength   (c) soil   (d) concentration of water

15:How much you are exposed or you take into the body

(a) intake    (b) output    (c) area   (d) quantity

1.Ethanol is readily absorbed from the

b.gastro-intestinal tract


d.All of these

2.Ethanol is poorly absorbed through




3.Organic mercury is readily absorbed from



d.both a &b

4.Parathion is more toxic to

a.young animals

b.old animals born

d.all of these

5.nitrosamines are more toxic to


b.old animals

c.young animals

d.both a & c

6.Antibiotics are selective toxic to





7.Metabolism also known





8.How many types male rats sensitive than female to liver damage from DDT?

a.10 times

b.20 times

c.5 times

d.15 times

9.Female rats are _____ as sensitive to parathion as are male rats.





10.Metabolism have

a.two types

b.three types

c.four types

d. None

11._______ is the conversion of a chemical from one form to another by a biological organisms.





12.A toxic substance produced by biological system is specially referred to as a





13.The most common target organ of toxicity is the ______




14.The most rapid exposure to a chemical would occur through when of the following routes _______





15.Absorption of the poison means

a.poison reaches circulation

b. Poison leaves blood to tissues

c. Effect of the poison on receptors

d. None of the above