All Free Biology MCQs with Answers

1071. Which of the following cell organelles is absent in animal cells and present in a plant cell?

• A. Cell wall
• B. Cytoplasm
• C. Vacuoles
• D. Mitochondria

Explanation: A plant cell has a cellulose cell wall outside its plasma membrane, while an animal cell lacks a cell wall. Students may choose vacuoles because plant cells typically have a large central vacuole, but small vacuoles can also occur in animal cells.

1072. What content does only a plant cell has___________?

• A. Cell Membrane
• B. Cell wall
• C. Cytoplasm
• D. Chromatin

Explanation: A cell wall is a rigid outer layer made mainly of cellulose and is characteristic of plant cells, whereas the cell membrane, cytoplasm and chromatin occur in both plant and animal cells. Students may choose the cell membrane because it also forms an outer boundary, but it is present in animal cells too.

1073. Febries are what kind of cells ?

• A. Parenchymatous
• B. Sclerenchymatous
• C. Chloroplast
• D. None of the above

Explanation: Interpreting “Febries” as “fibres,” plant fibres are sclerenchymatous cells with thick, lignified walls that provide strength. Students may choose parenchymatous cells because they are common living plant cells, but parenchyma generally has thin walls and functions mainly in storage or photosynthesis.

1074. Which tissue of plants conducts food to its body?

• A. Phloem
• B. Parenchyma
• C. Xylem
• D. None of the above

Explanation: Phloem transports organic food, mainly sucrose made during photosynthesis, from source tissues to growing or storage regions of the plant. Students may choose xylem because it is another conducting tissue, but xylem carries water and mineral ions rather than manufactured food.

1075. The food conducting tissue of a plant is __________ ?

• A. Phloem
• B. Xylem
• C. Parenchyma
• D. Collenchyma

Explanation: Phloem is the living vascular tissue that transports sugars and other organic nutrients from sources such as leaves to consuming or storage regions. Xylem mainly conducts water and mineral salts, while parenchyma and collenchyma provide storage or support rather than long-distance food transport. Students may choose xylem because both xylem and phloem are conducting tissues, but xylem conducts water, not manufactured food.

1076. programmed death of cells is called _____________________?

• A. Necrosis
• B. Apoptosis
• C. Blood cancer
• D. All of these

Explanation: Apoptosis is programmed cell death, in which a cell is removed through a controlled sequence that usually avoids inflammation. Necrosis is uncontrolled cell death caused by injury or disease, so students may choose it if they treat all forms of cell death as the same process.

1077. Banana belongs to which category?

• A. herb
• B. tree
• C. grass
• D. None of these

Explanation: Banana is a giant herb because its apparent trunk is a pseudostem formed from tightly packed leaf bases, not a true woody stem. Students may choose tree because a banana plant is tall and tree-like, but true trees develop a woody stem with secondary growth.

1078. All cell of an organism are similar in_________?

• A. Shape
• B. Size
• C. Structure
• D. Fundamental organization

Explanation: Cells in an organism differ greatly in shape, size and specialized structures, but they share a basic cellular organization such as a plasma membrane, cytoplasm and genetic material. Students may choose structure because cells have a common basic plan, but their detailed structures vary with their functions.

1079. Among the following which one is a diploblastic organism?

• A. Hydra
• B. Crabs
• C. Squids
• D. Earthworm

Explanation: Hydra is diploblastic because its embryo develops two germ layers, ectoderm and endoderm, separated by mesoglea. Crabs, squids and earthworms are triploblastic and develop three germ layers. Students may choose a larger animal such as the crab, but body size is unrelated to the number of germ layers.

1080. what is the scientific name of onion?

• A. Rana tigrina
• B. Allium cepa
• C. Aspergillus
• D. None of these

Explanation: The scientific name of onion is Allium cepa, with Allium as the genus and cepa as the species name. Students may choose Aspergillus because it is also a biological scientific name, but Aspergillus is a fungal genus, not onion.