Blue Exam 3

What Structure holds two sister chromatids together A) Centromere B) Centriole C) Chromatin D) Spindle E) Centrosome

A) Centromere

Rebecca has a tumor in her ovaries. She recently underwent a series of tests and is returning to the doctor to find out the results. Which of the following would be the best news that Rebecca could receive from her doctor? A) It is a benign tumor. B) The cells are cancerous and are in situ C) It is a malignant tumor. D) It is malignant ovarian cancer E) The tumor has metastasized and invaded neighboring tissue

A) It is a benign tumor.

. Which of the following statements is correct? A) Meiosis involves two divisions and produces four nonidentical gametes. B) Meiosis involves one division and produces two nonidentical gametes. C) Mitosis involves one division and produces two nonidentical gametes. D) Mitosis involves two divisions and produces four identical gametes. E) Meiosis involves two divisions and produces four identical gametes

A) Meiosis involves two divisions and produces four nonidentical gametes.

Alternation of generations means that a diploid sporophyte produces haploid spores by melosis, and a haploid gametophyte produces gametes by mitosis. A) True B) False

A) True

An increase in the amount of protein produced is an advantage of using plants to develop products for the pharmaceutical industry. A) True B) False

A) True

Cytokinins may help promote the growth of new plants in tissue culture. A) True B) False

A) True

Gametophytes of flowering plants are produced within the flower. A) True B) False

A) True

Losing weight can reduce an obese person's risk for cancer by up to 40%. A) True B) False

A) True

Plants are naturally able to reproduce asexually because they contain meristematic tissue A) True B) False

A) True

The application of abscisic acid to a plant may prevent fruit maturation. A) True B) False

A) True

A friend complains that all of her houseplants have bent stems. You examine the plants and find that their stems all curve toward the light. What would you recommend to your friend to correct the problem? A) Turn each plant occasionally so that different sides will face the light. B) Apply an auxin to the shady side of the stems. C) Water the plants more frequently. D) Apply gibberellins to the bases of the stems. E) Repot the plants. F) By turning the plants, different

A) Turn each plant occasionally so that different sides will face the light.

Plants undergo an alternation of generations. This means that the diploid spores, which develop into the haploid A) a sporophyte; gametophyte B) gametophyte; sporophyte C) sporophyte; seeds D) flowers; gametophyte E) sporophyte; flowers

A) a sporophyte; gametophyte

Auxin causes bending in stems and roots by A) causing cell elongation. B) preventing cell elongation. C) breaking down cell walls. D) causing cell shrinkage. E) inhibiting lateral bud growth

A) causing cell elongation.

In which stage do the three germ layers form? A) gastrula B) blastocyst C) neurula D) morula E) 8-cell stage

A) gastrula

A birth control pill works by A) inhibiting FSH and LH production B) making the woman's reproductive tract toxic to sperm. C) stimulating FSH and LH production. D) destroying the endometrium. E) immunizing the woman against human chorionic gonadotropin (hCG).

A) inhibiting FSH and LH production

During which stage of the cell cycle do the chromosomes duplicate? A) interphase: S B) interphase: G1 C) interphase: G2 D) prophase E) telophase

A) interphase: S

How does follicle-stimulating hormone (FSH) affect the male reproductive system? A) promotes testosterone production B) causes erection C) promotes spermatogenesis D) stimulates ovulation E) triggers ejaculation

A) promotes testosterone production (PTP)

Which lifestyle choice is responsible for 90% of the cases of lung cancer among men? A) smoking B) using tanning beds C) excessive alcohol consumption D) drug use E) using smokeless tobacco

A) smoking

If a cell stops at the G1 checkpoint, this is most likely due to what problem? A) there is DNA damage B) the DNA has not finished replicating C) the chromosomes are not aligned properly D) the cell is cancerous E) the chromosomes are not properly attached to the spindle

A) there is DNA damage

The embryo (and later the fetus) is connected to the placenta by the A) umbilical cord. B) placental tube. C) somite. D) chorionic villi E) vas deferens.

A) umbilical cord.

If ethylene is applied to a bushel of apples, what is most likely to occur? A)The fruit will all ripen. B) The apple seeds will go into a state of dormancy. C) The seeds will germinate. D) The fruit will retain its water for a longer period of time. E) The apple stem will fall off.

A)The fruit will all ripen.

Which STD is caused by a protozoan? A) chlamydia B) genital herpes C) trichomoniasis D) gonorrhea E) hepatitis

C) trichomoniasis

Which STD is caused by a virus? A) chlamydia B) syphilis C) trichomoniasis D) gonorrhea E) genital warts

C) trichomoniasis

A protein that promotes apoptosis would be considered a(n) A) oncogene. B) proto-oncogene. C) tumor suppressor. D) mutant tumor suppressor. E) signal transduction pathway protein

C) tumor suppressor.

. Which part of male anatomy is part of both the urinary system and the reproductive system? A) testis B) seminal vesicle C) urethra D) prostate gland E) bulbourethral gland

C) urethra

A cell is inhibited during the S phase of its cycle. It will not reproduce due to a lack of A) ATP availability B) Centriole migration C) Centromere formation. D) DNA synthesis. E) Plasma membrane structure.

D) DNA synthesis.

Which of the following statement is correct regarding the events of the cell cycle A) DNA is duplicated during the G1, and G2 phase B) DNA replicates during Cytokinesis C) The M phase is usually the longest phase of the cell cycle D) Interphase consists of G1,S, and G2 E) The cell enter a non-diving state in the G2 phase

D) Interphase consists of G1, S, and G2

The human life cycle consists of A) adults who are haploid and produce diploid gametes: these gametes fuse to produce a haploid zygote which grows into an adult B) zygotes who are haploid fuse to produce a diploid gamete which grows into an adult. C) gametes that are diploid and produce haploid zygotes; these grow into haploid adults. D) adults who are diploid and produce haploid gametes; these gametes fuse to produce a diploid zygote which grows into an adult. E) adults that are diploid who produce zygotes that are also diploid.

D) adults who are diploid and produce haploid gametes; these gametes fuse to produce a diploid zygote which grows into an adult.

The first 22 pairs of chromosomes are called _______ while the 23rd pair are known as the ______chromosomes, which code for gender A) homologous; autosomes B) autosomes; homologous C) diploid; haploid D) autosomes: sex E) sex; autosomes

D) autosomes: sex

A flower that is bisexual contains A) only carpels. B) only stamens. C) extra sepals. D) both stamens and carpels. E) anthers but no filaments

D) both stamens and carpels.

Sperm are produced A) by Sertoli cells. B) in the epididymis. C) by interstitial cells. D) in the seminiferous tubules. E) in the seminal vesicles

D) in the seminiferous tubules.

The failure of a couple to achieve pregnancy after a year of regular, unprotected intercourse is termed A)Parthenogenesis. B) menopause. C) contraception. D) infertility E) abortion.

D) infertility

If a woman has been diagnosed with genital warts, she should be examined regularly for A) cervical cancer. B) liver cancer. C) pelvic inflammatory disease (PID). D) gummas E) skin cancer.

D) pelvic inflammatory disease (PID).

A root growing into the Earth is exhibiting negative gravitropism. A) True B) False

B) False

The application of auxin to a seed may cause it to germinate. A) True B) False

B) False

A monocot seed consists of a seed coat, two cotyledons, an embryo, and an endosperm A) True B) False

B) False ( one cotyledons)

The Birth control device consists of a small piece of plastic inserted into the uterus by a healthcare provider A) cervical cap B) IUD C) diaphragm D) female condom E) vaginal sponge

B) IUD

The G2 checkpoint prevents the cell cycle from continuing until A) It is known for sure if the cell will divide. B) The DNA has finished replicating. C) The chromosomes are properly attached to the spindle fibers. D) All the organelles have been duplicated E) The centrosomes have been duplicated.

B) The DNA has finished replicating.

A plant's growth response toward or away from a directional stimulus is called A) apical dominance. B) a tropism. C) senescence. D) a photoperiod. E) dormancy.

B) a tropism.

During crossing-over, A) genetic material is exchanged between sister chromatids, resulting in new combinations of alleles. B) genetic material is exchanged between non-sister chromatids, resulting in new combinations of alleles. C) sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles D) non-sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. E) one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles

B) genetic material is exchanged between non-sister chromatids, resulting in new combinations of alleles.

Metaphase Il is more similar to metaphase of mitosis than to metaphase I because, A) in metaphase I, tetrads align together at the spindle equator. B) in metaphase Il, tetrads align separately at the spindle equator. C) in metaphase of mitosis, tetrads align separately at the spindle equator. D) in metaphase lI, chromosomes align separately at the spindle equator. E) in metaphase I, chromosomes align separately at the spindle equator

B) in metaphase Il, tetrads align separately at the spindle equator.

Some citizens are concerned about the use of genetically modified plants because they A) are better for the environment. B) may create herbicide-resistant superweeds. C) are less nutritious than the original plant D) are genetically identical. E) do not grow as well as the original plant.

B) may create herbicide-resistant superweeds.

Since plant sperm are nonflagellated, how do they reach the ovule from the stigma? A) the sperm swim in water B) the sperm are delivered by a pollen tube C) the sperm are carried on air currents D) the sperm delivered by insects E) the ovules are delivered to the stigma

B) the sperm are delivered by a pollen tube

Ovulation usually occurs on day _ of a woman's cycle. A) 0 B) 7 C) 14 D) 21 E) 28

C) 14

Which pair of chromosomes on a karyotype would show you the sex of a baby? A) 21st pair B) 18th pair C) 23rd pair D) 6th pair E) 1st pair

C) 23rd pair

When during the cell cycle are chromosomes visible? (under a microscope) A) only during interphase B) only when they are being copied C) During mitosis D) Only during the G1 phase E) Chromosomes are always visible

C) During mitosis

When a plant is experiencing water stress, A) auxin will shut down vessel elements. B) gibberellins will stimulate growth of root hairs. C) abscisic acid will stimulate closure of stomata. D) ethylene will increase water flow in vessel elements. E) cytokinins will stimulate elongation of stems and growth of new leaves.

C) abscisic acid will stimulate closure of stomata.

Peaches may be ripened at home by enclosing them in a paper bag. This is due to the A) production of which hormone? B) auxin cytokinin C) ethylene D) Abscisic acid E) Gibberellins

C) ethylene

Because tomatoes contain seeds they are classified as a A) plant. B) vegetable. C) fruit. D) tree. E) legume.

C) fruit.

Which of these places the events of the menstrual cycle in the correct order? A) menstrual phase- ›secretory phase-›proliferative phase-›ovulation B) menstrual phase- ›ovulation-›secretorv phase-,proliferative phase C) menstrual phase-›proliferative phase- ›ovulation-›secretory phase D) menstrual phase-›proliferative phase-›secretory phase ›ovulation menstrualphase-›ovulation-›proliferative phase- ›secretory phase

C) menstrual phase-›proliferative phase- ›ovulation-›secretory phase

Plants with both female and male flowers on the same plant are called A) complete. B) incomplete. C) monoecious. D) dioecious. E) bisexual.

C) monoecious.

Cancer is a disorder in which some cells have lost the ability to control their A) size B) spindle fibers. C) rate of cell division. D) surface area. E) volume

C) rate of cell division.

One of the main goals of meiosis is A) create cells that are genetically identical to their parent cell. B) to create a fertilized egg that has half the genetic material of the parents. C) to reduce the number of chromosomes by half in gametes D) to prevent genetic disorders. E) to reduce genetic diversity.

C) to reduce the number of chromosomes by half in gametes

Which of the following is a characteristic of someone with Down syndrome? A) short stature B) eyelid fold C) stubby fingers D) fissured tongue E) All of the above answers describe the characteristics of someone with Down syndrome.

E) All of the above answers describe the characteristics of someone with Down syndrome.

Which of the following is an advantage of genetically engineered plants? A) increased yield B) herbicide resistance C) drought tolerance D) disease protection E) All of the above are advantages of genetically engineered plants.

E) All of the above are advantages of genetically engineered plants.

Which of the following structures is part of the reproductive system? A) oviduct B) ovary C) cervix D) vagina E) All of the answers are parts of the female reproductive system.

E) All of the answers are parts of the female reproductive system.

Which of the following pharmaceutical products can be produced by genetically modified A) antigens B) antibodies C) hormones D) therapeutic proteins E) All of these are produced by plants.

E) All of these are produced by plants.

Which of the following is an inaccurate statement about mitosis? A) The cells arising from mitosis are genetically alike B) The process of nuclear division is followed by cytokinesis C) Spindle fibers are involved in the movement of chromosomes during mitosis D) Both sexually and asexually reproducing organisms utilize the process of mitosis E) The cells arising from mitosis contain only half of the necessary genetic material

E) The cells arising from mitosis contain only half of the necessary genetic material

Which of the following is 1009% effective against both pregnancy and STDs? A) Vasectomy B) female condom C) diaphragm D) tubal ligation. E) abstinence

E) abstinence

If a woman has an untreated case of chlamydia, it may likely lead to A) gummas. B) liver failure. C) buboes. D) blisters on the genitals. E)pelvic inflammatory disease. (PID)

E)pelvic inflammatory disease. (PID)