STEM Concepts Flashcards
7 cards from real BCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 STEM Concepts flashcards as text
A circuit has a 12-volt battery and a 4-ohm resistor. What current flows through it?
Answer: 3 A
Using Ohm's Law, I = V/R = 12/4 = 3 amperes.
What is the role of RNA polymerase in molecular biology?
Answer: Transcribes DNA into mRNA
RNA polymerase reads the DNA template strand and synthesizes a complementary mRNA strand during transcription.
In set theory, what does A ∩ B represent?
Answer: Elements in both A and B
The intersection A ∩ B contains only elements that belong to both set A and set B simultaneously.
Which layer of the Earth is primarily composed of iron and nickel and generates Earth's magnetic field?
Answer: Outer core
The liquid outer core, composed of iron and nickel, generates Earth's magnetic field through convection currents.
In programming, what does a 'function' or 'method' primarily allow developers to do?
Answer: Reuse blocks of code without repetition
Functions encapsulate reusable logic so it can be called multiple times without duplicating code.
What is the value of log₁₀(1000)?
Answer: 3
log₁₀(1000) = 3 because 10³ = 1000.
Which type of chemical bond involves the sharing of electron pairs between atoms?
Answer: Covalent bond
Covalent bonds form when atoms share one or more pairs of electrons, typically between nonmetals.