DNA Structure and Chromosome Function

The video tutorial explains the differences between chromatin, chromosomes, chromatids, and DNA. Chromatin is the unwound state of DNA in the nucleus, while chromosomes are condensed DNA structures formed during cell division. Chromatids are duplicated chromosomes connected before cell division. The video also clarifies that each chromosome is a single strand of DNA, and humans have 46 such strands. The tutorial aims to clear up common misconceptions about DNA structure and its various forms.

What is the normal state of DNA inside the nucleus called?

• Chromosome

• Chromatin

• Nucleosome

• Chromatid

Why do cells condense DNA into chromosomes?

• To make DNA more visible

• To increase DNA replication speed

• To protect DNA from damage

• To facilitate cell division

What analogy is used to explain the purpose of condensing DNA into chromosomes?

• A stack of books

• A pile of yarn

• A bundle of sticks

• A roll of tape

What are the two identical copies of a chromosome called before they separate?

• Daughter chromosomes

• Sister chromatids

• Chromatin fibers

• Nucleotides

During which process do chromatids separate into individual chromosomes?

• Transcription

• Mitosis

• Translation

• Meiosis

What happens to chromosomes after cell division?

• They unwind back into chromatin

• They become chromatids

• They remain condensed

• They are destroyed

How many strands of DNA do humans have?

• 184

• 92

• 23

• 46

What is each chromosome made up of?

• Multiple strands of RNA

• One strand of DNA

• Proteins and lipids

• Two strands of DNA

What is the state of DNA when it is not condensed into chromosomes?

• Chromatin

• Gene

• Chromatid

• Nucleosome

What term is used to describe the entire collection of DNA strands in a cell?

• Genome

• Chromosome

• Chromatid

• Nucleus