TRUEFALSE QUESTIONSIF TRUE SHADE A IF FALSE SHADE B Classes

TRUE/FALSE QUESTIONS-IF TRUE SHADE A; IF FALSE SHADE B Classes include Kingdoms. Bacterial spores can survive treatment that would kill almost any other organism. Penicillin acts against bacteria by suppressing their energy metabolism. Anaerobic bacteria would not have to form heterocysts to fix nitrogen. Saprobes parasitize plants. Their high mutation rates allow bacteria to adapt to changes in their environments. If a cell infected with a virus were treated with a drug that blocks mRNA translation, the virus would still be able to reproduce. Humankind\'s most prevalent disease is caused by an apicomplexan. Photosynthesis by protists supports aquatic food chain. Many fungi depend on plants for mineral absorption. The evolutionary advantage of brightly-colored fruits is that bright colors aid seed dispersal. Coenocytic fungi have many nuclei in one extensive cytoplasm. The disease called kuru, a fetal neurodegenerative disorder, is caused by a viroid Viroids are RNA not covered by a capsid All members of the kingdom fungi reproduce both sexually and asexually. Transduction occurs when a virus infects a bacterial cell and then transfers some of the cell\'s DNA to another bacterium. Fertility plasmids also known as F factors, allow bacteria to mate with each other. Gametes are produced in gametophytes that are part of a gametangial plant. Antheridia and archeogonia are spore-producing structures on the sporophyte plant. Spore mother cells undergo meiosis and develop into haploid gametes. Chemoautotrophs are able to use energy from the sunlight to synthesize organic compounds. Bacteria cells do not have ribosomes that is why they cannot make proteins. Protists regulate their water content using contractile vacuole. Bacteria living in the human gut produce vitamins. In nonvascular plants the sporophyte is the dominant stage.

Solution

Answers:

1. False

The sequence is Kingdom, Phylum, Class, Order, Family, Genus and Species.

2. True

Spores are highly resistant to treatments which kills most microorganisms.

3. False

Penicillin acts on the peptidoglycan layer of bacterial cell wall.

4. True

Free living, anaerobic, non photosynthetic bacteria can fix nitrogen without heterocyst.

5. False

Saprobes thrive on dead organic matter.

6. True

Bacteria can mutate at a high rate to adapt and survive in changing environment.

7. Fals

In simplest case, if a drug affects the host\'s translational machinery, the virus will not be able to produce/synthesize its capsid proteins. So, would not reproduce.

8. True

Malaria caused by Plasmodium (apicoplexan) can be regarded as the most prevalent disease in humans.

9. True

Protists conduct a quarter of the world\'s photosynthesis.

10. False

Fungi, such as in mycorrhizal facilitates water absorption for plants.

11. True

Apart from attracting animals for pollination due to the fruit\'s bright colour, it also helps in seed dispersal by animals.

12. True

They contain multiple nuclei in a coenocytic mycelium.

13. False

Kuru is caused by prions.

14. True

Viroids are RNA particles without protein coat.

15. False

Deuteromycetes do not have a sexual phase in their life cycle.

16. True

Bacteriophage DNA integrates into the host genome. Under unfavourable conditions, the phage DNA may take up a portion of the host DNA during packaging. When it infects another bacterium, the DNA from the previous host cell gets transferred.

17. True

F factors results in the formation of conjugation tubes in bacteria for mating.

18. True

Gametangia are gamete producing cells or organs in plants.

19. False

Antheridia produces sperms while archegonia produces gametes.

20. False

Megaspore mother cell undergoes meiosis to produce 4 haploid megaspores.

21. False

Chemoautotrophs utilize inorganic sources and not sunlight.

22. False

Bacteria has 70s ribosomes.

23. True

Contractile vacuoles perform osmoregulation.

24. True

They play a role in synthesis of vitamin B and K.

25. False

In non vascular plants, gametophyte stage is dominant.