Home
Class 12
BIOLOGY
read the following characteristics and s...

read the following characteristics and select the correct statement w.r.t bacteriophage. (a) usually have ds DNA as genetic material. (b) Tail is proteinaceous and contains genetic material. (c) show binal symmetry. (d) it has 6 tail 3 and 6 tail fibres which aids its attachment to host cell

A

(a), (b) &(c)

B

(a), (c) &(d)

C

(b), (c) &(d)

D

(a) & (d) only

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the characteristics of bacteriophages, we need to analyze each statement provided and determine which ones are correct. ### Step-by-Step Solution: 1. **Understanding Bacteriophages**: - Bacteriophages, commonly known as phages, are viruses that specifically infect bacteria. They consist of genetic material (either DNA or RNA) surrounded by a protein coat. 2. **Evaluating Statement (a)**: - **Statement (a)**: "Usually have ds DNA as genetic material." - **Analysis**: Most bacteriophages do indeed have double-stranded DNA (dsDNA) as their genetic material. This statement is **correct**. 3. **Evaluating Statement (b)**: - **Statement (b)**: "Tail is proteinaceous and contains genetic material." - **Analysis**: The tail of a bacteriophage is primarily made of proteins and does not contain genetic material. The genetic material is located in the head of the bacteriophage. Therefore, this statement is **incorrect**. 4. **Evaluating Statement (c)**: - **Statement (c)**: "Show binal symmetry." - **Analysis**: Bacteriophages exhibit binal symmetry, which means they have a complex structure with an icosahedral head and a helical tail. This statement is **correct**. 5. **Evaluating Statement (d)**: - **Statement (d)**: "It has 6 tail fibers which aids its attachment to host cell." - **Analysis**: Bacteriophages typically have tail fibers (often 6) that help them attach to the bacterial host cell. This statement is **correct**. 6. **Conclusion**: - The correct statements regarding bacteriophages are (a), (c), and (d). Therefore, the correct answer is that statements A, C, and D are correct, while statement B is incorrect. ### Final Answer: The correct statements regarding bacteriophages are (a), (c), and (d). ---
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 7

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|32 Videos

  • MOCK TEST 9

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|16 Videos

Similar Questions

Explore conceptually related problems

Select the correct set of statements for the virus first crytallised by Stanley. (a) It has either single or double standard DNA as its genetic material (b) Subunits of their protein coat are arranged helically (c) It is an obligate plant parasite. (d) First discovered by M.W. Beijerinck

Consider the following four statements A, B, C and D and select the right option for two correct statement :- Statements :- (A) RNA was first genetic material (B) 5-methyl uracil found in RNA (C) DNA polymerase-III does not require RNA primer for the synthesis of DNA strand (D) RNA primer formed over 3'end of template strand The correct statements are :-

Identify the following statements is true ( T) or false (F ) for genetic diversity and select the correct option : (A) Genetic diversity is a diverstiy shown by a single species at genetic level ( B ) It is total genetic information contained in all individuals of a community. ( C ) Rauwolfia vomitoria shows the variation in the term of concentration of active chemical reserpine. (D) India has more than 50000 genetically different strains of mango.

Read the following statements and choose the correct option w r t catecholamines (a) Water soluble hormones which interact with the membrane bound receptors (b) Work through second messenger (c) Binds to external domain of the extracellular receptor present on cell surface (d) They form hormone-receptor complex on the cell surface

Read the following statements w.r.t. fungi and select the incorrect option. (a) Aseptate and multinucleate fungal hyphae are reffered as coenocytic. (b) In oomycetes members, cellulosic cell wall is present. (c) Fungal cellulose is made up of acetylglucosamine. (d) Septum in members of class basidiomycetes have no pore. (e) Fungal cells have unicisternal golgi bodies.

Read the following statement w.r.t. features of biomes and select the correct option for tropical rain forests. a. Buttress roots b.Vines, lianas, epiphytes are abundant c.Highly leached soils d. Soil has high base content e. 30-40 m tall canopy structure with 2-3 strata only

Which of the following statements is not applicable to viruses? (a) The virus replicates in a bacterial host. (b) The protein coat of a virus does not enter the host cell. (c) The genetic material is DNA or RNA. (d) The virus replicates autonomously in the absence of a host.

Read the following statements w.r.t clone. and identify the correct statements. a . Individuals are exact copies of each other and their parents b. Involves mitotic as well as meiotic division. c. Group of morphologically and genetically similar individuals. d. Individual member of clone is referrod as "ramet."

read the following statements w.r.t tobacco mosaic virus. (a) it is rod like elongated virus which is 3000 A long and 180 A in diameter. (b) it consists of 2130 capsomeres, arranged helically to form the capsid. (c) its genetic material is ds RNA (d) its RNA consists of 6400 nucleotides (e) Nucleotide Capsomeres ratio is 3: 1. select the correct option