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BIOLOGY A - UNIT 1 EXAM QUESTIONS
AND ANSWERS 2025
Unit 1 Exam
Study the atomic model.
Two particles, a neutron and an electron, are to be added to
this model.
In what location should each be added? - correct answer-
neutron: inside the nucleus
electron: on the circle
What element is the central part of all the different substances
found in living things, such as carbohydrates and proteins? -
correct answer- carbon
This element makes teeth strong. It is also needed for nerve
function.
What element is this? - correct answer- calcium
In one molecule of carbon dioxide:
There are two different atoms.
BIOLOGY A - UNIT 1 EXAM QUESTIONS
AND ANSWERS 2025
Unit 1 Exam
Study the atomic model.
Two particles, a neutron and an electron, are to be added to
this model.
In what location should each be added? - correct answer-
neutron: inside the nucleus
electron: on the circle
What element is the central part of all the different substances
found in living things, such as carbohydrates and proteins? -
correct answer- carbon
This element makes teeth strong. It is also needed for nerve
function.
What element is this? - correct answer- calcium
In one molecule of carbon dioxide:
There are two different atoms.
