Question

eParamecium 31. Which of the following animal viruses never needs to use the nucleus of its host cell to carry out its full replication cycle? a. Papovaviridae b. Herpesviridae c. Retroviridae d. Human Papillomavirus e. Rhabdoviridae 32. Which structures in bacteriophages are responsible for attachment by binding to a host cell receptor? a. spikes b. tail fibers c. prophages d. capsomeres e, nucleotides 33. Which structures in animal viruses are responsible for attachment by binding to a host cell receptor? a. spikes b. tail fibers c. prophages d. capsomeres e. nucleotides 34. Phylogenetically speaking, which organism is most closely related to members of the Kingdom Plantae? a. Anopheles b. Penicillium c. Spyrogyra d. Rhizopus e. Rhizobium 35. Which two groups are the most phylogenetically related? a. Animals and Archaea b. Fungi and Plants c. Red Algae and Bacteria d. Protozoa and Bacteria e. Amoeba and Archaea

Answer 1

ANSWER31: the correct answer isoption C , retroviridae. because Unlike DNA viruses, dsRNA viruses (retroviruses) do not require host replication polymerases, rather they replicate in the core “capsid” that is in the cytoplasm.

ANSWER32: the correct answer is option A, tail fibres of the tail helps in attachement.

ANSWER33: Attachment occurs when specific proteins on the viral capsid or viral envelope bind to specific receptor proteins on the cell membrane of the target cell. As no option such as proteins is provided i think we can can go with option d, capsomeres.

ANSWER 34: option C, spirogyra because their cells contain chloroplasts that display a dizzying variety of shapes, and their cell walls contain cellulose, as do land plants.

ANSWER 35: ption A, animalsand archae, The Eukarya include all animals, plants, fungi, and protists. These organisms are eukaryotes, they have membrane-enclosed nuclei within their cells.indicates that Archaea and Eukarya are more closely related to each other than either is to Bacteria.