Biology, 21.02.2020 01:58 jm482931

Which of the following statements is supported by Chargaff's rule about the composition of DNA?

A:DNA is a single stranded nucleic acid that contains uracil.

B:The number of adenines in a strand of DNA is equal to the number of thymines.

C:The "steps" of the DNA ladder are made of sugar and phosphates.

D:DNA is a complex of RNA wrapped around protein

Why is DNA replication said to be semiconservative?

A:The old cell keeps part of the original DNA during cell division.

B:The new DNA strand can only be constructed in the 3' to 5' direction.

C:The double helix becomes a single strand of DNA.

D:New DNA has one original strand and one replicated strand.

Which of the following is the complimentary DNA strand for the sequence shown below?
ACT GCA
A:ACG TCA

B:ACU GCA

C:UCT GCU

D:TGA CGT

What is the central dogma of molecular biology? Explain its meaning.

Answers: 2

Show answers

Another question on Biology

Biology, 22.06.2019 00:40

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Answers: 2

Answer

Biology, 22.06.2019 05:40

The body of water found at number 4 on the map above is the

Answers: 1

Answer

Biology, 22.06.2019 06:00

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Answers: 1

Answer

Biology, 22.06.2019 10:00

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

Answers: 1

Answer

You know the right answer?

Which of the following statements is supported by Chargaff's rule about the composition of DNA?

Questions