SB2 abc

Which statement correctly describes how the structure of DNA facilitates replication?

• A Because the DNA molecule is so large, it can remain stationary.

• The hydrogen bonds between strands are weak and easily broken.

• The shape of DNA molecules allows them to stack close to each other.

• Because there are few nucleotides, only limited variations are possible.

Genetic engineering was a major factor in the development of which of the following?

• High-strength metals

• Miniature electronics

• Synthetic fabrics

• Disease-resistant crops

Tags

NGSS.HS-ETS1-1

Which of the following is the best explanation of the process of translation?

• An mRNA strand is copied from the original DNA sequence.

• Amino acids are arranged in a specific order to build a protein.

• A tiny fragment of DNA is moved to a different location on the chromosome.

• The basic structure of DNA is changed due to a mistake or environmental factor.

Tags

NGSS.HS-LS1-1

One product of biotechnology is genetically modified foods. Some people are concerned about these foods because–

• they are usually more nutritious than naturally produced foods.

• allergens from one food may be accidentally transferred to a different food.

• unmodified crops usually grow more slowly than genetically modified crops.

• the production of these foods increases the biodiversity of organisms on Earth.

Tags

NGSS.HS-LS3-2

Which of the following is one of the ethical concerns raised about cloning?

• A potential life is destroyed when embryonic cells are used.

• The technology required and the training needed for cloning are costly.

• Cloning is a lengthy and delicate procedure that is prone to failure.

• The health benefits of cloned cells interfere with the natural progress of disease.

Between the two strands of a DNA segment the nitrogen bases are held together by

• covalent bonds

• hydrogen bonds

• metallic bonds

• ionic bonds

The DNA sequence reads ACGTTCATT before a mutation occurs. After the mutation, the DNA sequence reads ATCGTTCATT. Which type of mutation occurred?

• substitution

• insertion

• deletion

• point

Tags

NGSS.HS-LS3-2

Which is a frameshift mutation?

• substitution

• nonesense

• silent

• deletion

Tags

NGSS.HS-LS3-2

Because DNA replication is semi-conservative, it results in two DNA molecules,

• each with two new strands.

• one with two new strands and the other with two original strands.

• each with one new strand and one original strand.

• each with two original strands.

During transcription, the genetic information for making a protein is “rewritten” as a molecule of

• messenger RNA.

• transfer RNA.

• ribosomal RNA.

• translation RNA.