AP Intermediate 1st Year Cell: The Unit of Life — practice questions — page 2

Explore 38 free Cell: The Unit of Life questions in AP Intermediate 1st Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Cell: The Unit of Life with Quill →

Cell: The Unit of Life questions and exercises with answers

Showing questions 31–38 of 38.

Worked practice questions

Eukaryotic ribosomes are typically:

50S (only small subunit, in bacteria)
70S (prokaryotic, smaller cells)
80S (in cytoplasm, made of 60S + 40S)
100S (a hypothetical large form)

Show answer and solution

Correct answer: C. 80S (in cytoplasm, made of 60S + 40S)

**Eukaryotic ribosomes:** 80S (composed of 60S large + 40S small subunits). **Prokaryotic:** 70S (50S + 30S). **Mitochondrial + chloroplast ribosomes:** 70S (like bacteria; supports endosymbiotic origin).

Open this question →

Cilia and flagella exhibit the characteristic '9 + 2' arrangement of:

Microfilaments (actin protein, thinnest)
Microtubules (tubulin protein, hollow cylindrical)
Intermediate filaments (keratin family)
Centriole triplets (9 + 0 arrangement)

Show answer and solution

Correct answer: B. Microtubules (tubulin protein, hollow cylindrical)

**Cilia + flagella:** 9 OUTER PAIRS of microtubules + 2 CENTRAL microtubules ('9+2'). **Centrioles:** 9 triplets, no central pair ('9+0'). All made of tubulin. Both used in motility + signalling.

Open this question →

Match each cell organelle to its function.

Read exercise and reference answers

Matching pairs

Left
Mitochondria
Right
ATP / energy production
Left
Ribosome
Right
Protein synthesis
Left
Lysosome
Right
Intracellular digestion

Instructions

Tap a left tile, then its matching right tile.

_Source: syllabus Biology, Ch 8 'Cell — The Unit of Life'_

Open this exercise →

How to practise

Choose a Cell: The Unit of Life question and try to work out your answer.
Open the question to check the correct answer and read its worked solution.
Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Cell: The Unit of Life practice for AP Intermediate 1st Year. Read explanations as you go. No signup form needed to start.

Practise Cell: The Unit of Life →