39 Questions
What is the function of the nucleus in a cell?
Encloses and protects the cell's genetic material
Which type of cells have a nucleus to protect their DNA?
Eukaryotic cells
Where is the nucleus located in a cell?
In the center of the cell
What organelle is often referred to as the 'brain' of the cell?
Nucleus
Which nitrogenous base pairs with adenine in RNA?
Uracil
What is the process called when RNA 'copies' the DNA using base pairing?
Transcription
What is the function of transfer RNA (tRNA) during translation?
Bond with mRNA using base pairs
What defines a key difference between DNA and RNA in terms of structure?
Being double-stranded vs single-stranded
Which molecules are made in the nucleus and control protein production?
mRNA and rRNA
What is the final product of gene expression that carries out specific functions?
Protein
What is the function of the nucleolus?
Handles the production of ribosomes
What is the role of the smooth endoplasmic reticulum in a cell?
Synthesizes lipids and hormones
Why is protecting the DNA a vital job of the nucleus?
To safeguard an organism's traits
What is the main function of genes in a cell?
Code for specific traits or functions
During which cell process does DNA replication occur?
Cell division
What happens to chromatin during cell division?
Forms into chromosomes
Where is ribosomal RNA (rRNA) formed within a cell?
In the nucleolus
What is the primary function of the nuclear pores in the nuclear envelope?
To allow substances in and out of the nucleus
Which organelle is responsible for synthesizing lipids and hormones?
Smooth endoplasmic reticulum
What is the role of chromatin within the nucleus?
Organizes into chromosomes during cell division
Why is it essential for a cell to differentiate?
To handle one specific job effectively
What occurs during the first phase of cell division?
Chromosomes are pulled to opposite sides of the cell
What is the role of the nucleus in a cell?
Controlling DNA replication and expression
Which type of cells lack a nucleus to hold their genetic material?
Prokaryotic cells
What is the function of the nucleolus in a cell?
Producing ribosomes
Where are ribosomes typically found in relation to the nucleus within a cell?
On the surface of the nucleus
What are the nitrogenous bases that pair up consistently in DNA?
Guanine with adenine
Which molecule replaces thymine in RNA base pairing?
Uracil
What is the role of transfer RNA (tRNA) during translation?
Transporting amino acids
What does DNA consist of?
Double strands twisting around each other
Which nucleic acid is responsible for carrying messages from DNA to ribosomes?
mRNA
What occurs during the process of transcription?
Unraveling of DNA for RNA synthesis
What is the role of the nucleolus in the nucleus?
Producing ribosomes
During which cell process does chromatin usually appear as a mess of threads?
Cell division
Which organelle is responsible for synthesizing proteins in the cytoplasm?
Ribosomes
What is the main function of the nuclear pores in the nuclear envelope?
Allowing substances to move in and out of the nucleus
How does the nucleus contribute to cell differentiation?
By controlling gene expression
What is the primary function of genes in a cell?
Controlling gene expression
Where is ribosomal RNA (rRNA) formed within a cell?
Nucleus
Explore the significance of the nucleus as the 'brain' of the cell, responsible for enclosing and protecting the cell's genetic material and controlling DNA replication. Learn how the structure of cells reflects that of a body, with organelles performing specific functions.
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