Are all of the mitochondrial proteins encoded by mitochondrial DNA?
What will be an ideal response?
Ans: Most mitochondrial proteins are encoded by nuclear DNA, translated in the cytoplasm and imported into mitochondria. The mitochondrial DNA of mammals only encodes 13 proteins and fewer than 20 noncoding RNAs, such as tRNAs and rRNAs. Mitochondrial genes are transcribed and translated within the organelle, using organelle-specific RNA polymerase and ribosomes.
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During DNA replication, deoxyribonucleosides are added to the 5' end of Okazaki fragments and to the 3' end of the leading strand.
Answer the following statement true (T) or false (F)
In the late 1970s Woese argued that there are two fundamentally different groups of prokaryotes by demonstrating:a
different DNA sequences in prokaryotes. b. some prokaryotes carry on photosynthesis. c. the difference in the appearance of the nuclei. d. gene codes of ribosomal RNA of different bacteria. e. some prokaryotes produce methane while others do not.
Match the following items with the correct phrase.
_______1. Yeasts and molds are examples of ____________________. _______2. All ____________________ are photosynthetic. _______3. ____________________ are classified by their means of locomotion. _______4. The cell walls of ____________________ contain chitin. _______5. The cell walls of ____________________ contain cellulose. _______6. ____________________ rarely cause infectious diseases, but cause a variety of microbial intoxications. _______7. ____________________ are examples of a symbiotic relationship known as mutualism. _______8. ____________________ cause diseases such as African sleeping sickness, babesiosis, cryptosporidiosis, malaria, and toxoplasmosis. _______9. Diseases caused by ____________________ are called mycoses. _______10. Toxins produced by ____________________ are called phycotoxins.
Most strains of gonococcus do not survive long outside the body
Indicate whether this statement is TRUE or FALSE.