2nd_RC2_Week5

Multiple Choice

B6B Scientists use zebra fish to study human genetic diseases because zebra fish and humans share many of the same genetic diseases. Which statement describes why zebra fish experience similar genetic diseases as humans?

• Zebra fish have an omnivorous diet similar to that of humans.

• Zebra fish have nucleotide sequences similar to those of humans.

• Zebra fish go through embryonic stages similar to those of humans.

• Zebra fish produce gametes through a process that is similar to that of humans

Multiple Choice

B6B In the early 1980s scientists were able to produce two biomolecules by splicing a human gene

into the bacterium E. coli to make recombinant human insulin and growth hormone. Which statement best explains why this experiment was successful?

• Human cells are eukaryotic, and E. coli cells are prokaryotic.

• All living organisms share the same genome.

• The genes for all organisms are composed of the same building blocks

• The human body contains many types of bacteria, including E. coli.

Multiple Choice

B6B Organisms can be classified based on homology, which is shared characteristics inherited from a common ancestor. In the past, homologies were based on studies of anatomical structures and patterns of embryonic development. In more recent years, the use of molecular biology techniques has allowed homologies to be compared at the level of nucleotide sequences.

Nucleotide sequence comparisons are possible because all organisms share which of the following?

• DNA bases

• Cellular organelles

• Division of the nuclear chromosomes

• Types of proteins needed for cellular functions

​Environmentalfactors, in this case temperature, is turning "on" or "off" of certin genes that code for fur color.

​

​Himalayan Rabbit

​

Multiple Choice

In Siamese cats, the fur on the ears, paws, tail, and face is usually black or brown, while the rest of the body fur is almost white. If a Siamese cat is kept indoors where it is warm, it may grow fur that is almost white on the ears, paws, tail, and face, while a Siamese cat that stays outside where it is cold, will grow fur that is quite dark on these areas.

The best explanation for these changes in fur color is that ___.

• an environmental factor influences the expression of this inherited trait

• the location of pigment-producing cells determines the DNA code of the genes

• skin cells that produce pigments have a higher mutation rate than other cells

• the gene for fur color is modified by interactions with the environment

Multiple Choice

The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur.

A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area . The shaved area grew black fur.

Which of these best explains why the hair that grew back where the Ice pack was placed was black and not white?

• The white hair mutated to black hair as the rabbit's body temperature decreased.

• The coat color changed from white to black with the age of the rabbit.

• The genes for black hair were activated by specific temperatures.

• White hair only grows during certain times of the year.

Match

Match the following

• mRNA

• tRNA

• rRNA

a message made from DNA

delivers amino acids to the ribosome

the ribsome where proteins are made

• a message made from DNA

• delivers amino acids to the ribosome

• the ribsome where proteins are made

Dropdown

the codon is on the ​

Select answer

the anti-codon is the ​

Select answer

Multiple Choice

The first stage of Protein Synthesis is...

• Transcription

• Translation

Multiple Choice

How many bases make up a codon?

• 1

• 2

• 3

• 4

Match

Match the following

• Messenger RNA is a linear molecule which carries a copy of the gene to be expressed from the nucleus. Every group of three bases (a 'triplet') is described as a codon because each one codes for an amino acid.

• Transfer RNA has a cloverleaf shape. It is made from a single strand of RNA which folds due to base pairing to form this unusual shape. It has a triplet anti-codon site and an attachment site for a specific amino acid.

• Ribosomal RNA and proteins form the ribosome. The ribosome is the structure where protein synthesis takes place.

mRNA

tRNA

rRNA

• mRNA

• tRNA

• rRNA

Multiple Choice

The second stage of Protein Synthesis is...

• Transcription

• Translation

Genotype - the combination of alleles.

Phenotype - the physical characteristics

Multiple Choice

A flower's red color an example of a....

• Genotype

• Phenotype

Multiple Choice

A cat's calico fur an example of a....

• Genotype

• Phenotype

Genotypes: Dominant and Recessive Alleles

Multiple Choice

Identify the genotype

• HETEROZYGOUS

• HOMOZYGOUS DOMINANT

• HOMOZYGOUS RECESSIVE

Multiple Choice

Identify the genotype

• HETEROZYGOUS

• HOMOZYGOUS DOMINANT

• HOMOZYGOUS RECESSIVE

Multiple Choice

Identify the genotype

• HETEROZYGOUS

• HOMOZYGOUS DOMINANT

• HOMOZYGOUS RECESSIVE