Which of the following is a difference between plant and animal cells? MCQ with Answer and Explanation

Question
Which of the following is a difference between plant and animal cells?
A. Plant cells have a plasma membrane; animal cells do not.
B. Plant cells have a cell wall and chloroplasts; animal cells lack these.
C. Animal cells have vacuoles; plant cells lack vacuoles.
D. Plant cells have centrioles; animal cells lack centrioles.
Answer: Option B
Solution (By JKExamLibrary)
Plant cells possess a rigid cell wall of cellulose, chloroplasts for photosynthesis, and a large central vacuole. Animal cells lack cell wall and chloroplasts, and have small temporary vacuoles if present. Centrioles are present in animal cells (centrosome) but absent in higher plant cells. Both have plasma membrane. The cell wall provides shape and protection. These differences are fundamental in cell biology.
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Question #1
Translation, the process of protein synthesis, occurs at the:
A. Mitochondria
B. Golgi apparatus
C. Ribosome
D. Nucleus
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Correct Answer: Option C

Explanation:
Translation is the process where the genetic code carried by mRNA is decoded to synthesize a specific sequence of amino acids, forming a protein. This process occurs at the ribosomes in the cytoplasm. Ribosomes read the mRNA codons and match them with the anticodons of tRNA molecules carrying the corresponding amino acids.
This question belongs to: Science Biology
Question #2
The type of ecological pyramid that can be inverted in a parasitic food chain is the:
A. Pyramid of numbers
B. Pyramid of productivity
C. Pyramid of biomass
D. Pyramid of energy
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Correct Answer: Option A

Explanation:
A pyramid of numbers can be inverted when a single tree (producer) supports many herbivores, or many parasites live on a single host. Energy pyramids are always upright. Biomass pyramid can be inverted in aquatic systems.
This question belongs to: Science Biology
Question #3
Consider statements about human physiology: 1. The pancreas secretes both digestive enzymes and hormones. 2. The liver secretes bile, which contains digestive enzymes. 3. The gall bladder stores and concentrates bile. Which are correct?
A. 1 and 3 only
B. 1 and 2 only
C. 1, 2 and 3
D. 2 and 3 only
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Correct Answer: Option A

Explanation:
The pancreas is a mixed gland; its exocrine part secretes digestive enzymes (trypsin, lipase, amylase), and its endocrine part (Islets of Langerhans) secretes hormones (insulin, glucagon). The liver continuously secretes bile, but bile does not contain digestive enzymes; it contains bile salts that emulsify fats. The gall bladder stores and concentrates this bile before releasing it into the duodenum. Thus, statements 1 and 3 are correct.
This question belongs to: Science Biology
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