Biology Unit 2 Test

In the controversial scientific process of cloning, organisms are created that are genetically identical to the parent. This process would be classified as

• meiosis

• fertilization

• sexual reproduction

• asexual reproduction

The processes pictured occur during ____.

• anaphase

• metaphase

• prophase

• telophase

This nitrogenous base, adenine, pairs with ___________ in DNA.

• adenine

• cytosine

• guanine

• thymine

Since the early 1990s, geneticists have produced ____________ crops that yield fruits and vegetables commonly found in U.S. supermarkets.

• large harvest

• genetically modified

• mutationally induced

• transgenically reduced

During DNA replication, what would be the complementary strand to the original DNA segment of GCTAAT?

A DNA strand has the codon AAT. According to the chart, the corresponding messenger RNA codes for which amino acid?

• alanine

• glycine

• leucine

• serine

Tags

NGSS.HS-LS1-1

Translation of the DNA sequence AAGCTGGGA would result in

• an mRNA strand with the sequence TTCGACCCT.

• an mRNA strand with the sequence UUGCACCCU.

• a DNA strand with the base sequence TTCGACCCT.

• a sequence of three amino acids linked by peptide bonds.

What situation is an example of artificial selection?

• Female bluegill fish prefer to lay their eggs in the nests of larger male fish.

• Albino deer or rabbits have a low survival rate in nature, because it is easy for predators to spot them.

• Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.

• More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.

Identify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make.

• DNA -> messenger RNA -> transfer RNA -> protein

• DNA -> transfer RNA -> messenger RNA -> protein

• DNA -> transfer RNA -> protein -> messenger RNA

• Protein -> messenger RNA -> transfer RNA -> DNA

Tags

NGSS.HS-LS1-1

Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by

• crossing over of sister chromatids during meiosis.

• crossing over of sister chromatids during mitosis.

• crossing over of homologous chromosomes during mitosis.

• crossing over of homologous chromosomes during meiosis.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1