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OAT > Science > Flashcards

Science Flashcards

0
Q

The layer of skin in which melanin producing cells are found is the

A

Epidermis

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1
Q

The separation of DNA fragments based on their size is called?

A

Electrophoresis

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2
Q

Some damaged cells in the body undergo a process of programmed cell death that is called

A

Apoptosis

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3
Q

Cystic fibrosis is a recessive disease in humans. Based on the principle of classical Mendelian genetics, what is the probability that a child will be born with the disease if one parent is a carrier of the trait and the other parent is homozygous dominant?

A

0%

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4
Q

The process of bone formation in the fetus in which cartilage is absent is know as

A

Intramembranous ossification

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5
Q

A symbiotic relationship between two organisms in which one partner benefits, while the other is harmed is called

A

Parasitism

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6
Q

Which of the following immune cells are known to be inherently phagocytic?

A

Neutrophils and macrophages

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7
Q

The ability to perform photosynthesis is present in which of the following kingdoms

A

Mineral, Protista, and Plantae

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8
Q

Bone tissue remodeling is a function of which of the following

A

Osteoblasts and osteoclasts

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9
Q

In the three domain have more biochemical similarities with which of the following

A

Eukaryotes

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10
Q

Which of the following are functions of the kidney

A

Renal resorption, renal excretion, hormone secretion, and filtration

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11
Q

During photosynthesis the light-dependent reactions take place in the

A

Chloroplast

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12
Q

The second law of thermodynamics states that

A

All systems have a tendency to move towards disorder

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13
Q

During the cell-cycle, cells carry out their normal functions and double their number of organelles in what stage?

A

Interphase

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14
Q

The region of the heart that initiates the heartbeat is the

A

Sinoatrial node

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15
Q

The organelle inside of the cell that breaks down toxic chemicals is the

A

Peroxisome

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16
Q

The inability of chromosomes to separate properly during anaphase is known as

A

Nondisjunction

17
Q

The first macromolecule that formed on Earth was

A

RNA

18
Q

The developing embryo is called a____ and undergoes the 16-cell phase and the 32-cell phase

A

Morula

19
Q

_______ is the final electron acceptor in the electron transport chain

A

Oxygen

20
Q

Inside the cell, ribosomes are produced by which of the following?

A

Nucleolus

21
Q

Unicellular organisms are found in all of the following kingdoms

A

Monera, Protista, and Fungi

22
Q

Which of the following are pyridmidine bases found in nucleic acids

A

Thymine, Uracil, and Cytosine……..

not adenine

23
Q

The process by which embryonic cells begin to differentiate into their final cell types during development is called

A

Induction

24
Q

Which of the following is a component of the cell’s cytoskeleton?

A

Microfilaments, Microtubules, Intermediate filaments, and Tubulin

25
Q

In the DNA molecule the base pairs are held together by

A

Hydrogen bonds

26
Q

During human fertilization sperm cells bind to the _____ of the egg

A

Zona pellucida

27
Q

According to the principle of _____ , speciation is a slow process that occurs in a uniform progression over time

A

Gradualism

28
Q

During DNA replication, ______ adds new nucleotides to the growing DNA strand that are complementary to the parent strand.

A

DNA polymerase

29
Q

Involuntary muscles that do not contain strait ions are called

A

Smooth muscle

30
Q

Stem cells that have the ability to differentiate into all types of human tissue are

A

Totipotent

31
Q

Multicellular bodies, movement, and heterotrophy are characteristics of which of the following kingdoms

A

Animalia

32
Q

Premature male pattern baldness is caused by a gene located on the

A

X chromosome

33
Q

________ enzymes have multiple binding sites

A

Allosteric

34
Q

In a type III survivorship cure, mortality occurs

A

Early in life

Type I = die late in life
Type II = Constant rate regardless of age

35
Q

Alleles are

A

Different copies of the same gene

36
Q

The innermost layer of meninges is the

A

Pia mater

37
Q

A windy ecosystem that receives low levels of annual precipitation and has frozen soil year-round is referred to as a

A

Tundra

38
Q

which of the following is true of the digestive, respiratory and urinary systems

A

They maintain the balance of substances in the blood

39
Q

Inside the cell proteins are synthesized by what organelle(s)

A

Ribosomes

40
Q

The carbon atom is located in Group 4A of the periodic table. Carbon can from

A

3 triple bonds and ionic bonds

OAT (1 decks)

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