Use the following choices to answer questions 7 and 8.
a. Animalia
b. Fungi
c. Plantae
d. Bacillota (gram-positive bacteria)
e. Pseudomonadota (gram-negative bacteria)
Into which group would you place a photosynthetic organism that lacks a nucleus and has a thin peptidoglycan wall surrounded by an outer membrane?

검증된 단계별 안내

Identify the key characteristics of the organism described: it is photosynthetic, lacks a nucleus, and has a thin peptidoglycan wall surrounded by an outer membrane.

Recall that organisms lacking a nucleus are prokaryotes, which excludes groups Animalia, Fungi, and Plantae because they are eukaryotic.

Understand that the presence of a thin peptidoglycan layer surrounded by an outer membrane is characteristic of gram-negative bacteria.

Recognize that photosynthetic prokaryotes with these cell wall features are typically classified under Pseudomonadota (gram-negative bacteria).

Match the organism's features to the correct group from the choices provided, which is Pseudomonadota (gram-negative bacteria).

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Prokaryotic Cell Structure

Prokaryotic cells lack a nucleus and membrane-bound organelles. Their genetic material is free-floating in the cytoplasm. Understanding this helps distinguish prokaryotes from eukaryotes, which have a defined nucleus.

Gram-negative Bacterial Cell Wall

Gram-negative bacteria have a thin peptidoglycan layer located between an inner cytoplasmic membrane and an outer membrane containing lipopolysaccharides. This structure differs from gram-positive bacteria, which have a thick peptidoglycan wall but no outer membrane.

Photosynthetic Prokaryotes

Some prokaryotes, like cyanobacteria, perform photosynthesis despite lacking a nucleus. They contain pigments such as chlorophyll and have cell walls typical of gram-negative bacteria, enabling them to produce energy from sunlight.