Bio Exam 3; chapters 14-18

difference/s between RNA and DNA? a. RNA has ribose sugar, DNA has deoxyribose sugar b. RNA has thymine instead of uracil c. both a and b d. RNA is usually double stranded

a. RNA has ribose sugar, DNA has deoxyribose sugar

what is the (unknown) genotype of a tulip plant resulting in all red flowered offspring? red = dominant white = recessive a. homozygous dominant b. homozygous recessive c. heterozygous d. either a or c

a. homozygous dominant

what type of bond holds two nucleotides together within a DNA or RNA strand? a. hydrogen bond b. phosphodiester bond c. ionic bond d. vanderwaal's forces

a. hydrogen bond

which of the following is homozygous recessive? a. rr b. AA c. TT d. Ff

a. rr

if the mixture of heat killed S cells and living R cells would not have killed the mouse, then a. transformation did not occur b. transformation occured

a. transformation did not occur

when one gene interferes with expression of other genes, this is called epistasis a. true b. false

a. true

if blue eye (B) is dominant to brown eye (b) then what % of offspring will be homozygous dominant from Bbxbb? a. 50% b. 0% c. 25% d. 75%

b. 0%

a man with hemophilia marries a woman with normal blood, but is a carrier for hemophilia, what % of offspring have hemophilia? a. 100% b. 50% c. 25% d. 0%

b. 50%

an individual with the genotype A/a:B/b:C/C:D/d cannot produce which of the following gametes? a. A:B:C:D b. A:b:c:d c. A:B:C:d d. A:b:C:d

b. A:b:c:d

a woman with type B blood has a child with blood type O, which of the following can not be the father of the child? a. A b. AB c. O d. B

b. AB

a woman (IA/i) and a man (IB/IB) can have children with the following a. A, B, AB, and O b. AB, B c. AB, O d. AB and A

b. AB, B

which association between complementary bases would require the most energy to break (has the highest bond dissociation) a. A:T b. C:G c. C:A d. A:U

b. C:G

mutation occurred during DNA replication making double helix DNA unable to unwind. which enzyme might be nonfunctional? a. DNA ligase b. DNA helicase c. DNA polymerase d. primase

b. DNA helicase

which of the following is not true of dominant genes? a. dominant genes are always expressed wherever they are present b. a dominant gene will overpower all other genes to be the only one expressed c. two dominant genes can be expressed together in a situation of co dominance d. none of the above

b. a dominant gene will overpower all other genes to be the only one expressed

which of the following phenotypes is unlikely to be a multifactorial trait affected by environment? a. the risk of lung cancer b. down's syndrome c. high body weight d. schizophrenia

b. down's syndrome

DNA polymerase can catalyze the addition of nucleotide into the 5' end of the growing DNA strand a. true b. false

b. false

Phage injects its genetic material (proteins) into bacterial cells and thus infects them a. true b. false

b. false

when one gene has multiple phenotypic effects, this is called Polygenic Inheritance a. true b. false

b. false

what is the (unknown) genotype of a tulip plant resulting in all white offspring? red = dominant white = recessive a. homozygous dominant b. homozygous recessive c. heterozygous d. either a or c

b. homozygous recessive

when a red flower is crossed with a white flower you get a pink flower. this is an example of? a. co dominance b. incomplete dominance c. polygenic inheritance d. epistasis

b. incomplete dominance

DNA replicates through what process? a. conservative b. semi conservative c. dispersive replication d. random

b. semi conservative

in polygenic inheritance, traits are determined by: a. multiple alleles at a single locus b. the interaction of multiple genes c. two dominant alleles on a gene d. one gene being masked by another

b. the interaction of multiple genes

can a colorblind mother and a healthy father have colorblind children? a. yes, but only colorblind daughters b. yes, but only colorblind sons c. yes, colorblind sons and daughters d. no

b. yes, but only colorblind sons

what would be the sequence on the complementary strand for the following DNA sequence: 5'AAGTAAGA a. 5'TTCATTCT b. 3'TCTTACTT c. 5'TCTTACTT d. 5'TTCATTGT

c. 5'TCTTACTT

a man with normal blood marries a woman with normal blood, but is a carrier for hemophilia, what % of sons would have hemophilia? a. 100% b. 25% c. 50% d. 0%

c. 50%

a mouse was killed by a mixture of heat killed pathogenic cells (S) and living non pathogenic cells (R) why? a. lipids from S cells made R cells more virulent b. RNA from S cells made R cells more virulent c. DNA from S cells made R cells more virulent d. proteins from S cells made R cells more virulent

c. DNA from S cells made R cells more virulent

which of the following is a step necessary to create the lagging strand, but not the leading strand in DNA replication? a. DNA is synthesized in the 5'-3' direction b. helicase unwinds the parent strand of DNA c. DNA ligase joins the Okazaki fragments together d. DNA polymerase synthesizes template DNA from the parent strand

c. DNA ligase joins Okazaki fragments together

during proofreading, which of the following enzymes reads the DNA? a. primase b. totoisomerase c. DNA pol d. helicase

c. DNA pol

which of the following is heterozygous? a. GG b. tt c. Gg d. RR

c. Gg

which of the following is not an example of co dominance? a. a child of parents with blood types A and B has AB blood b. a calf of a red cow and a white cow has red and white hairs c. a child of parents with blue eyes and brown eyes has brown eyes d. a flower offspring of red and white flowers has both red and white petals

c. a child of parents with blue and brown eyes has brown eyes

which is not an example of incomplete dominance? a. a pink flower produced from red and white flowers b. curly haired and straight haired individuals producing wavy haired offspring c. a flower that is both red and white produced from red and white flowers d. a highly spotted dog and a non spotted dog producing puppies with a few spots

c. a flower that is both red and white produced from red and white flowers

the different forms of a gene are called? a. traits b. pollinators c. alleles d. hybrids

c. alleles

what are sex linked genes? a. genes that sit on any autosomal chromosome b. any gene that sits on a sex chromosome c. genes on a sex chromosome that are inherited differently in males and females

c. genes on a sex chromosome that are inherited differently in males and females

what is the (unknown) genotype of a tulip plant resulting in 50:50 ratio of red and white offspring? red = dominant white = recessive a. homozygous dominant b. heterozygous dominant c. heterozygous d. either a or c

c. heterozygous

in eukaryotes, what is DNA wrapped around? a. single-stranded binding proteins b. polymerase c. histones d. sliding clamp

c. histones

separation of homologous chromosomes during meiosis refers to which of the following processes? a. independent assortment b. differentiation c. segregation d. reduction

c. segregation

in snapdragons crossing two pink flowers will produce which of the following offspring? a. all red b. all pink c. 1/2 red, 1/2 pink d. 1/4 red, 1/2 pink, 1/4 white

d. 1/4 red, 1/2 pink, 1/4 white

an individual with the genotype A/a:B/b can produce gametes containing the following alleles? a. AaBb b. A/a:B/b c. A:B or a:b d. A:B, A:b, a:B, or a:b

d. A:B, A:b, a:B, or a:b

why must there be a lagging strand during DNA synthesis? a. the lagging strand helps conserve energy b. DNA is a polyanion c. the lagging strand ensures replication of both strands similar rate d. DNA is antiparallel

d. DNA is antiparallel

which of the following types is not a dominant trait? a. A blood type b. B blood type c. A and B blood type d. O blood type

d. O blood type

what materials does DNA polymerase require in order to synthesize a complete strand of DNA? a. all four nucleotide triphosphates (A, T, C, or G) b. single stranded DNA template c. 3'-OH end of the new strand d. all of the above

d. all of the above

human has 46 chromosomes, which option would you call aneuploid? a. 47 chromosomes b. 45 chromosomes c. 48 chromosomes d. both a and b

d. both a and b

in which direction does DNA replication take place? a. 5'-3' b. 3'-5' c. 5' d. 3'

a. 5'-3'

what would be the sequence on the complementary strand for following DNA sequence: 3'AAGTAAGAA a. 5'TTCATTCTT b. 3'TTCTTACTT c. 5'TTCTTACTT d. 3'TTCATTGTT

a. 5'TTCATTCTT

what was proved to be the genetic material in the Hershey-Chase experiment? a. DNA b. protein c. phage d. RNA

a. DNA