Ag Cte

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases

• the order (sequence) of the nitrogen bases

• the color of the nitrogen bases

• the frequency (number) of nitrogen bases

Answer explanation

The code of a DNA molecule is determined by the order (sequence) of the nitrogen bases. This sequence encodes the genetic information, while the shape, color, and frequency of the bases do not define the genetic code.

Tags

NGSS.HS-LS1-1

In the diagram strand I and II represent portions of DNA molecule. Strand II would normally include...

• AGC

• TCG

• TAC

• GAT

Answer explanation

Strand II would normally include the complementary base pairs to strand I. If strand I has 'CTA', the complementary sequence would be 'GAT', making 'GAT' the correct choice.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Replicate the following strand of DNA: 
AATCATGGA

• AATCATGGA

• TTAGTACCT

• UUAGUACCU

• GGATAUCUA

Answer explanation

To replicate the DNA strand AATCATGGA, we replace each base with its complementary base: A with T, T with A, C with G, and G with C. Thus, AATCATGGA becomes TTAGTACCT.

Which of the following is NOT one of the 3 types of RNA?

• mRNA

• tRNA

• rRNA

• cRNA

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

DNA and RNA are both nucleic acids made of many nucleotides. Each nucleotide is made of 3 basic parts: Select them from the choices below

• A phosphate group

• A carboxyl group

• A 5-carbon sugar

• A nitrogen base

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

The structure of DNA is known as a

• Double-helix model

• Single-stranded model

• Twisted ladder model

Tags

NGSS.HS-LS1-1

DNA is _______ stranded, RNA is _______ stranded

• single, double

• double, single

Tags

NGSS.HS-LS1-1

What is the chemical symbol for silver?

• Ag

• Au

• Pb

• Fe

Which of the following elements is a noble gas?

• Helium

• Silver

• Gold

• Iron

Tags

NGSS.HS-PS1-1