Unit 4 DNA Review 2

What is the relationship between DNA, a gene, and a chromosome?

• A gene is a segment of DNA. DNA coils tightly together to form a chromosome.

• A chromosome is in DNA. Genes are part of chromosomes.

• DNA is a segment of a gene. Chromosomes coil tightly together to form a gene.

• DNA is in chromosomes. Chromosomes are part of a gene.

Tags

NGSS.HS-LS3-1

If one side of the DNA strand has the base sequence ATGGCAATGTTACTAG, what is the base sequence of the complementary strand?

• TACCGAATCUUTGATC

• TACCGTTACAATCTUG

• TACCGTTACAATGATC

• TTGGGTTACAATGATC

DNA in Eukaryotic Cells is located in the _____________.

• nucleus
• cytoplasm
• ribosomes
• cell membrane

What is one of the most important facts about DNA?

• It is in everything

• It is the powerhouse of the cell

• without it plants could not perform photosynthesis

• it stores the genetic information necessary to build and maintain an organism, essentially acting as a blueprint for life

Tags

NGSS.HS-LS1-1

What biomolecules make up DNA?

• 1. Lipids

   

• 2. Nucleic acids

   

• 2. Proteins

• 2. Carbohydrates

   

A tightly coiled strand of DNA is called a

• 1. gene.

• 2. chromosome.

• 2. base.

• 2. protein.

Tags

NGSS.HS-LS3-1

A nucleotide in DNA is composed of

• 1. a deoxyribose sugar, a phosphate, and a nitrogenous base.

• 2. only a deoxyribose sugar and a nitrogenous base.

• 2. only a deoxyribose sugar and a phosphate.

• 2. None of the above

Organisms differ from one another because their DNA molecules have different order of the base pairs (four-letter sequences) that code for genes and traits.

• True

• False

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The rules of base pairing say that we can use the sequence of nucleotides on one strand of DNA to deduce the complementary sequence on the other strand. This is referred to as Chargaff’s rules of DNA base pairing. Chargaff determine the following are complimentary base pairs

• A-T; G-C

• A-G, T-C

• A-C; G-T

• A-A; T-T

The RNA world hypothesis was proposed in the 1960s by Carl Woese (1928–2012), Francis Crick (1916–2004), and Leslie Orgel (1927–2007). According to this hypothesis, RNA was the primary living substance 4 billion years ago, mainly due to RNA’s ability to function as both genes and enzymes.

• True

• False