Biology · Science General
Cell Biology and Structure
3,221 Questions
Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.
Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components
Cell Biology and Structure Questions
-
cilia and flagella
-
cell plate
-
phragmoplast
-
kinetochore
-
none of these
A
Correct answer
Explanation
A basal body is a protein structure found at the base of a eukaryotic undulipodium (cilium or flagellum).
-
lysosome
-
endoplasmic reticulum
-
mitochondria
-
cell membrane
-
mesosome
B
Correct answer
Explanation
Golgi body originates from the endoplasmic reticulum.
-
Scattered
-
Series
-
Alternate
-
Head parallel
-
None of these
D
Correct answer
Explanation
The arrangement of lipid molecules in a plasma membrane is known as head parallel.
-
mitochondria
-
chloroplasts
-
lysosomes
-
endoplasmic reticuli
-
ribosomes
B
Correct answer
Explanation
Quantasomes are particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place.
-
golgi bodies
-
lysosomes
-
endoplasmic reticulum
-
mitochondria
-
chloroplast
B
Correct answer
Explanation
Hydrolytic enzymes are found in lysosomes.
-
organization of the spindle
-
synapsis of homologous chromosome
-
nucleo-cytoplasmic exchange of material
-
anaphasic separation of daughter chromosome
-
none of the above
C
Correct answer
Explanation
Nuclear membrane contains nuclear pores that help in exchange of materials between cytoplasm and nucleus.
-
microsome
-
dictyosome
-
ribonucleoprotein
-
oxysome
-
mesosome
C
Correct answer
Explanation
Ribosome may also be called ribonucleoprotein as they are made up of RNA and proteins.
-
Nitrogen
-
Carbon
-
Oxygen
-
Hydrogen
B
Correct answer
Explanation
Carbon is the principal structural element of living cells. It forms the backbone of all organic molecules including carbohydrates, proteins, lipids, and nucleic acids, which are the fundamental building blocks of cellular structure and function.
D
Correct answer
Explanation
Cells are the smallest living units that make up all living organisms, including humans. Tissues, nerves, and muscles are all composed of cells, making cells the fundamental building block. The human body contains trillions of cells working together.
-
bicellular
-
multicellular
-
unicellular
-
tricellular
C
Correct answer
Explanation
Root hairs are unicellular.
-
Cytoplasm
-
Mitochondria
-
Both (1) and (2)
-
Vacuoles
B
Correct answer
Explanation
Kreb's cycle takes place in matrix of mitochondria. Hence, all enzymes for Kreb's cycle is found in mitochondria.
-
Bacterial cell
-
Mycoplasma
-
Nerve cell
-
Human liver cell
-
Red blood cell
B
Correct answer
Explanation
Mycoplasma is the smallest known cell. It is about 0.1 micrometres in diameter.
-
Mitochondria
-
Lysosome
-
Golgi apparatus
-
Vacuoles
-
None of these
A
Correct answer
Explanation
This is the correct answer as mitochondria is the powerhouse of the cell. It uses molecular oxygen and generates energy-rich compound (ATP).
-
Plasma membrane - covers and protect the cell contents
-
Cytoplasm - all cell organelles are suspended in it
-
Endoplasmic reticulum - helps in intracellular transport
-
Golgi bodies - stores, condenses and packs material
-
Lysosomes - sites of cellular respiration
E
Correct answer
Explanation
This is an incorrect pair as lysosomes are not the site of cellular respiration.
-
Nucleus
-
Mitochondrion
-
Lysosome
-
Plastid
-
Ribosome
A
Correct answer
Explanation
The nucleus is often called the director of a cell because it controls all the metabolic and other cell functions.