Chromosomes in a bacterial cell can be 1–3 in number and:
- Are always circular
- Are always linear
- Can be either circular or linear, but never both within the same cell
- Can be circular as well as linear within the same cell
The Correct Option is D
Solution and Explanation
Bacterial cells can have one or more circular chromosomes, and some bacteria can also have linear plasmids or linear chromosomes in addition to their circular chromosomes. The precise arrangement of genetic material can vary among different bacterial species.
So, the correct option is (D): Can be circular as well as linear within the same cell
Top Questions on biological classification
- Study the following and choose the incorrect combinations:
I. Phylum: Porifera, Special cells: Lasso cells, Example: Spongilla
II. Phylum: Cnidaria, Special cells: Stinging cells, Example: Hydra
III. Phylum: Ctenophora, Special cells: Choanocytes, Example: Pleurobrachia
IV. Phylum: Platyhelminthes, Special cells: Flame cells, Example: Fasciola- TS EAMCET - 2025
- Zoology
- biological classification
- Study the following and choose the correct combinations:
- TS EAMCET - 2025
- Zoology
- biological classification
- ICBN refers to?
- TS EAMCET - 2025
- Biology
- biological classification
- In a DNA molecule, which of the following base-pairings is correct?
- MHT CET - 2025
- Biology
- biological classification
- Which of the following microorganisms is used in the production of curd from milk?
- MHT CET - 2025
- Biology
- biological classification
Questions Asked in NEET exam
- Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in the construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near the anode while larger fragments are found near the wells in an agarose gel.- NEET (UG) - 2025
- Molecular Biology
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- RNA interference
- Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.
Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repair mechanisms. In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Structure of DNA and RNA
- A microscope has an objective of focal length \(f_o = 2\) cm and an eyepiece of focal length \(f_e = 4\) cm. The tube length of the microscope is \(L = 40\) cm. If the distance of distinct vision of eye is \(D = 25\) cm, the magnification in the microscope is:
- NEET (UG) - 2025
- Optical Instruments
- Two gases A and B are filled at the same pressure in separate cylinders with movable pistons of radii \(r_A\) and \(r_B\) respectively. On supplying an equal amount of heat to both the cylinders, their pressures remain constant and their pistons are displaced by 16 cm and 9 cm respectively. If the change in their internal energies is the same, then the ratio \(r_A / r_B\) is:
- NEET (UG) - 2025
- Thermodynamics
Concepts Used:
Biological Classification
The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
