ملخصات التحليلات جامعة الطوسي مرحلة الرابعة

d

b

A

b

b

حل اسئله المد تأكدو اكثر خاف اكو خطأ النقطه 27 جوابه B

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بعض من اسئلة الاحياء النظري

Which of the following is NOT a component required for DNA replication? a) DNA polymerase b) Helicase c) RNA polymerase d) Primase Which direction does DNA polymerase synthesize new DNA strands? a) 3' to 5' b) 5' to 3' c) 5' to 5' d) 3' to 3' Which of the following best describes the function of the DNA codons UAA, UAG, and UGA? A) Start codons, initiating the process of translation. B) Stop codons, signaling the termination of protein synthesis. C) Codons that code for specific amino acids. D) Regulatory codons, controlling gene expression. Which of the following is NOT a stop codon? a) UAG b) UGA c) AUG d) UAA What is the function of stop codons in protein synthesis? a) They signal the end of translation. b) They initiate translation. c) They indicate the start of transcription. d) They code for specific amino acids. Which of the following statements about the structure of DNA is correct? A) DNA is a single-stranded molecule. B) DNA contains the nitrogenous bases adenine, guanine, cytosine, and uracil. C) DNA is composed of a sugar-phosphate backbone with nitrogenous bases projecting inward. D) DNA strands run in parallel orientation to each other. احياء نظري د ذكرى

_What is the first step in the virus replication cycle? a- Penetration b- Synthesis c- Attachment ✔️ d- Release _ _In which step are viral proteins and nucleic acids synthesized? a- Attachment b- Synthesis ✔️ c- Assembly d- Release __ _one of the more common viruses are: a-COVID-19 b-Influenza c-meningitis d-all of above ✔️ _ _ which virus can lead to AIDS? a- Influenza b- HIV ✔️ c- SARS-CoV-2 d- HPV

'What structure determines the shape of a virus? a- Nucleus b- Capsid ✔️ c- Cell wall d- Mitochondria ____ _How many triangular faces does an icosahedron have? a- 10 b- 15 c- 20✔️ d- 25 ___ _Which of the following viruses has an icosahedral shape? a- Rabies b- Measles c- Herpes simplex✔️ d- Tobacco mosaic virus ____ _What shape is described as a spiral, similar to DNA? a- Icosahedron b- Helix✔️ c- Complex d- Cubic ___ 5. Which of the following viruses has a helical shape? a- Polio b- Chicken pox c- Measles✔️ d- Herpes simplex __ _Which shape is a combination of two other shapes? a- Helix b- Icosahedron c- Complex✔️ d- Spherical ____ _Which of the following is an example of a complex-shaped virus? a- Tobacco mosaic virus b- Polio c- Rabies d- Bacteriophage✔️

_ What is the typical size range of most viruses? A_ 2-25 nm B_ 20-250 nm✔️ C_ 250-500 nm D_ 500-1000 nm ___ _viruses that infect bacteria are known as... A-bacteriophage B-genome C-phage D-A&C ✔️ ___ _What is a virulent phage? A- A phage that infects animals. B- A phage that always lysogenizes its host. C- A phage that always lyses its host cell.✔️ D- A phage that contains an envelope. ___ _What type of genetic material can be found in a viral genome? A- Both DNA and RNA B- Only DNA C- Only RNA D- Either DNA or RNA but not both ✔️ _ _the capsid of virus made up of subunits called.. A-capsomeres ✔️ B-nucleocapsid C-envelope D-None of all __ _the capsid is... A-outer protein coat ✔️ B-inner Protein coat C-structure inside the cell D-D-None of all ____ _one of the structural virus components that not found in all viruses is .. A-Genome B-capsid C-viral envelope✔️ D-all of above

احياءعملي محاضرة "4" _What are viruses? A_ Small cells B_ small Obligate intracellular parasites ✔️ C_ Multicellular organisms D_ Plants ___ _what is the basic structure of a virus? A_ Nucleic acid surrounded by a membrane B_ Nucleic acid surrounded by a protein coat ✔️ C_ Ribosomes surrounded by a lipid layer D_ Mitochondria surrounded by a cell wall __ _Where can viruses replicate? A_ Outside living cell B_ Anywhere in the environment C_ Only within living cells ✔️ D_ Only within non-living materials _ _What is the term for the combination of a capsid and genome in a virus? A_ Capsule B_ Nucleolus C_ Nucleocapsid ✔️ D_ Endosome ____ _Viruses have an inner core of nucleic acid surrounded by a protein coat known as an... A- Capsid B- Envelope ✔️ C- Nucleocapsid D- Matrix

False lactobacillus الإختيار الصح

اسئلة احياء اجت منه بل مد

-classification based on..... a-ingredients b-physical state ✔️ c-color d-a & c

._classification of bacteria based on: a-gram stain sensitivity ✔️ b-mode of respiration c-physical state d-shape of bacteria