nucleus Flashcards
(26 cards)
What is the nucleus?
The nucleus is the central part of an atom that contains protons and neutrons.
True or False: The nucleus is positively charged.
True
What particles are found in the nucleus?
Protons and neutrons.
Fill in the blank: The nucleus is surrounded by ______.
electron clouds.
What is the charge of a proton?
Positive.
What is the charge of a neutron?
Neutral.
What does the atomic number represent?
The number of protons in the nucleus.
How do you calculate the mass number of an atom?
By adding the number of protons and neutrons in the nucleus.
True or False: The nucleus is the largest part of an atom.
False
What is the role of the nucleus in a cell?
It stores genetic information and controls cell activities.
What is the structure that surrounds the nucleus in a cell?
Nuclear membrane or nuclear envelope.
Multiple Choice: Which of the following is NOT found in the nucleus? A) Protons B) Neutrons C) Electrons D) Both A and B
C) Electrons
What term describes the dense region within the nucleus where ribosomal RNA is produced?
Nucleolus.
Fill in the blank: The nucleus is responsible for ______ synthesis.
DNA.
What is chromatin?
The material consisting of DNA and proteins in the nucleus.
True or False: The nucleus can be found in both prokaryotic and eukaryotic cells.
False
What type of cells contain a nucleus?
Eukaryotic cells.
Multiple Choice: Which of the following best describes the function of the nuclear envelope? A) Protects the nucleus B) Transports materials C) Produces energy D) Synthesizes proteins
A) Protects the nucleus
What is the function of nuclear pores?
They regulate the passage of molecules in and out of the nucleus.
What is the significance of the nucleoplasm?
It is the fluid within the nucleus that contains chromatin and nucleolus.
True or False: The nucleus plays a role in cell division.
True
Fill in the blank: The nucleus is often referred to as the ______ of the cell.
control center.
What is the relationship between the nucleus and ribosomes?
Ribosomes are produced in the nucleolus, which is within the nucleus.
What is the primary component of the nuclear matrix?
A network of fibers that provide structural support.
