Biology: Exam one

1. Which one of the following statements is true about female genital mutilation? It

A. gives acceptance for marriage.
B. helps to deliver baby easily.
C. keeps girls pure and honest.
D. imposes risk of infection.

2. Assume that you have a friend who is HIV positive and you are familiar about the case. How can you support your friend if she is injured and needs your help?

A. Help your friend with precautions
B. Ignore your friend because of the virus
C. Help your friend without any fear of the virus
D. Call to other people to protect you from the virus

3. Why are root hairs efficient in uptake of water from the soil? Because they

A. anchor the plant to the ground.
B. show positive hydrotropism.
C. have high surface area to volume ratio.
D. keep turgidity of the cell.

4. What will happen to a plant if the apical dominance is removed through repeated pruning? The

A. plant shades its leaves to withstand the condition.
B. plant elongates and bends to one direction.
C. growth of the lateral shoots will be inhibited.
D. side shoots grow quickly and the plant becomes bushy.

5. A farmer sowed cotton seeds in a farm land which fulfills the optimum conditions for germination. After a few days, he observed the newly growing seedlings. Which of the following statements is correct about the farmer's observation? The

A. growth of plumule above the soil surface
B. remaining of the cotyledon below the ground
C. growth of plumule without forming a hook
D. hypogeal germination of the hypocotyl

6. A transgenic organism is an organism that

A. replicates its DNA without control.
B. can undergo chromosomal non-disjunction.
C. is artificially cultured and harvested.
D. has received genetic material of another organism.

7. Which of the following explains how biology takes part in biosensor technology? Using microorganism to

A. monitor pollutants
B. develop vaccines
C. produce antibiotics
D. extract metals from ores

8. In a textile industry, microorganism's commercial products play a significant role in removing stains like grease by changing

A. the acidic or basic nature of the stain molecules.
B. the temperature of insoluble large stain molecules.
C. large insoluble stain molecules into small and soluble ones. D. the color of stain molecules to another color.

9. Which one of the following statements is correct about application of bio-pesticide in agriculture? It

A. uses bacteria and fungi or their metabolites to kill insects.
B. breakdowns glyphosate by an enzyme introduced into plant cell culture.
C. produces toxic chemicals by crops through modification of their genes.
D. produces insect resistant crops through modification of the plant genes using bacterial plasmids.

10. Which one of the following statements correctly describes bacteria? They are

A. multicellular eukaryotic organisms.
B. single celled prokaryotic organisms.
C. multicellular prokaryotic organisms.
D. single celled eukaryotic organisms.

11. What is the main function of the dermis of the skin?

A. Production of skin pigments
B. Prevention of the entry of pathogens
C. Temperature regulation in homeostasis
D. Synthesis of hair and nail proteins

12. This item is based on the following diagram about eye structure.
graph

The part of the eye represented by letter "Y" is

A. ciliary muscle.
B. iris.
C. pupil.
D. optic nerve.

13. Which of the following is the correct description of hormones? They are chemical messengers that

A. transmit message faster than the nerve system.
B. regulates many physiological process.
C. are produced in glands that contain ducts.
D. targets only the site of secretion.

14. A man observed elementary school students spinning around, and realized that none of them could properly walk upright after sudden interruption of the spinning. Which one of the following is the correct reason for this condition?

A. The fluid in the semicircular canal stopped immediately when the body stopped spinning.
B. The sensory cells were unable to detect stimulus after the spinning was quitted.
C. The nerve impulse was transmitted after the spinning was stopped.
D. The fluid in the semicircular canal kept moving after the spinning was interrupted.

15. Homeostasis is a mechanism of

A. keeping internal body environment constant.
B. adjusting the environment relative to body condition.
C. protecting the body from pathogens.
D. keeping external environment stable.

16. During oxidative phosphorylation, ATP is produced by combining ADP and inorganic phosphate using energy released from

A. transport of electrons from complex IV to complex I.
B. dehydrogenation of pyruvate to acetyl CoA.
C. transfer of electrons from NADH/FADH₂ to O₂.
D. decarboxylation of citrate to oxaloacetate.

17. Which one of the following comparisons between substrate level and oxidative phosphorylation is correct? During substrate-level phosphorylation

A. 34 ATP molecules are produced, but in oxidative phosphorylation 4 ATP molecules are produced per glucose molecule.
B. ATP is made in the cytosol and matrix, but in oxidative phosphorylation it is made on the inner membrane of mitochondria.
C. oxygen is the final electron acceptor, but in oxidative phosphorylation NAD is the electron acceptor.
D. protons are pumped into the inter-membrane space, but in oxidative phosphorylation they are pumped into the cytosol.

18. Which one of the following determines the cause and effect of lactate production during physical exercise? The demand for

A. a substrate that can easily release energy leads to production of lactate which results in muscle fatigue.
B. an easily absorbable molecule leads to the production of lactate that results in muscle fatigue.
C. more energy causes muscle cells to ferment respiratory substrates leading to muscle fatigue.
D. lower pH in muscle tissues leads to fermentation of respiratory substrates leading to muscle fatigue.

19. The view of biochemical origin of life hypothesized that the first life-forms appeared in warm primitive ocean and were heterotrophic. Which one of the following statements can support this idea?

A. Life is the inherent property of the universe which permits unlimited existence through usage of resource in it.
B. The appearance of dust of unknown source with microbial spores that can feed on organic molecules.
C. Resistant spores from meteorites reached to the earth and used organic molecules to survive in the environment.
D. The formation of abundant organic molecules due to radiations and the absence of oxygen led to the primitive living organisms.

20. Which statement shows the correct comparison between the Lamarck's and Darwin's theory of evolution?

A. Lamarck believed in the development of new traits due to variation while Darwin believed in their occurrence due to use and disuse of organs.
B. Darwin recognized the origin of species was through mutation while Lamarck believed it was through effect of the environment.
C. Darwin claimed that variation is heritable while Lamarck considers variation as acquired traits.
D. Lamarck believed the gradual occurrence of changes while Darwin believed in the immediate change of species.

21. Identify the correct mechanism of bacterial reproduction by conjugation.

A. Mitotic spindles are produced to separate bacterial DNA into two equal parts.
B. The recipient bacteria use their pili to pull the donor bacteria during plasmid transfer.
C. A pair of bacteria come together and exchanges their plasmid.
D. Bacteria take up genetic materials of dead organisms and integrate into their DNA.

22. Which one of the following features is NOT the characteristic feature of fungi? They

A. have haploid nuclei and multinucleate hypha.
B. reproduce asexually through spore production.
C. exhibit apical growth of networked hypha.
D. are either autotrophic, parasitic or saprophytic.

23. What is the argument behind the need of appropriate host cell for viruses to replicate themselves? Because viruses

A. are obligate saprophyte that can only replicate inside a cell.
B. have cell surface antigen specific to a given cell type.
C. lack of double strand DNA to duplicate themselves.
D. lack metabolic capacity to produce energy outside cells.

24. Which one of the following diseases and their mode of transmission is correctly matched?

A. Salmonellosis - contaminated food
B. Candidiasis - droplet infection
C. Common cold - direct contact
D. Chicken pox - fecal-oral-route

25. What is the basic difference between anabolism and catabolism?

A. Anabolism is related to respiration while catabolism is to photosynthesis.
B. Catabolism is condensation while anabolism is hydrolysis reaction.
C. Catabolism is a constructive while anabolism is destructive reaction.
D. Anabolism is energy absorbing while catabolism is energy releasing process.

Biology Exam: Eame one biology

Exam Results