Question

Comma shaped bacteria are
A. Bacilli
B. Spirilla
C. Vibrios
D. Cocci

Answer 1

Microscopic, single-celled species that live in complex environments are bacteria. In the soil, the ocean, and within the human gut, these species can easily live. Two protective coverings normally surround bacterial cells including an outer cell wall and an inner cell membrane.

Complete answer:
Bacteria are among the prokaryotes, which are single-celled organisms lacking a nucleus with a basic internal structure, and containing DNA that either floats freely in a nucleoid-like twisted, thread-like mass, or in separate, circular pieces called plasmids. Ribosomes are the spherical units in the bacterial cell where the information encoded in ribosomal RNA assembles proteins from individual amino acids. Some bacteria do not have a cell wall at all like mycoplasma. A final, outermost protective layer, called the capsule, may also be present in some bacteria. The surfaces of bacteria are often covered by whip-like extensions, long ones called flagella or short ones called pili, which help bacteria travel around and bind to a host.
Bacteria with a rod-shaped composition are referred to as bacilli. Clostridium tetani and Corynebacterium are its examples.
Spiral-shaped bacteria are called spirilla bacteria. Examples include Campylobacter and Spirillum.
In their body, bacteria with a comma-like single curve are Vibrio. Vibrio cholerae, Vibrio vulnificus, and others are examples.
Cocci are called bacteria that are round in form. Streptococcus pneumoniae and Staphylococcus aureus are examples.

Hence, the correct answer is (C).

Note:
The relationship of human beings with bacteria is complex. Bacteria often send us a helping hand for processes such as curdling milk into yogurt or digestion. Bacteria are destructive in some situations, causing illnesses such as pneumonia and methicillin-resistant Staphylococcus aureus (MRSA).