Life Science Questions

In which of the following directions is DNA read?
A. left to right
B. 3' to 5'
C. 5' to 3'
D. top to bottom

B

____________ are complex molecules that consist of chains of amino acids which have folded or twisted forming a fibrous or globular structure
A. lipids
B. carbohydrates
C. nucleic acids
D. proteins

D

The F2 phenotypes of a dihybrid cross show a repeated outcome of 9:3:4 dominant to recessive phenotypes across several experiments. This ratio should be considered which of the following?
A. Expected monohybrid ratio
B. Non-Mendelian ratio being observed

B

A Tt pea plant is crossed to a Tt plant. What is the expected ratio of phenotypes for offspring from this cross?
A. 3 tall: 1 dwarf
B. 1 tall: 3 dwarf
C. 2 tall: 1 dwarf
D. 1 tall: 1 dwarf

A

Phenotype refers to ___________.
A. gene arrangement
B. physical appearance
C. pattern of alleles
D. dominant

B

Phospholipids have a(n) __________ or "water-loving" group and have long hydrocarbon tails that are __________.
A. hydrophilic, hydrophobic
B. basic, acidic
C. hydrophobic, hydrophilic
D. acidic, basic

A

Enzymes are known as biological _________.
A. organelles
B. hormones
C. catalysts
D. codons

D

Having 2 recessive alleles would be called ____________.
A. homozygous dominant
B. homozygous recessive
C. heterozygous recessive
D. heterozygous dominant

B

A cross is made between a pea plant that is RrYy and one that is rrYy. What is the predicted outcome of the seed phenotypes?
A. 3 round, yellow: 3 round, green: 1 wrinkled, yellow: 1 wrinkled, green
B. 9 round, yellow: 3 round, green: 3 wrinkled, yellow:

D

Non-Mendelian inheritance includes which of the following?
A. multiple alleles
B. All of the options
C. dominance-recessive relationship between 2 alleles
D. co-dominance
E. Multiple alleles and co-dominance

E

A segment of DNA that encodes for a particular protein is known as a(n) _________.
A. chromatid
B. codon
C. gene
D. intron

A

A chromosome is a collection of __________.
A. chromatids
B. proteins
C. histones
D. genes

D

Mendel's first Law, the Law of Segregation, refers to the inheritance of a single trait and can be predicted using a(n) __________ cross.
A. unihybrid
B. monohybrid
C. polyhybrid
D. dihybrid

B

Which of the following bases would you NOT find in a DNA molecule?
A. Thymine
B. Uracil
C. Adenine
D. Guanine

B