DAT Science: Biology

Question 1

The separation of DNA fragments based on their sizes is called:

Answer 1

electrophoresis

Question 2

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

A. dermis

B. endoderm

C. mesoderm

D. epidermis

E. hypodermis

Answer 2

epidermis

Question 3

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

Answer 3

intramembranous ossification

Question 4

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

A. Monocytes

B. Neutrophils

C. Macrophages

D. Monocytes and Macrophages

E. Neutrophils and Macrophages

Answer 4

Neutrophils and Macrophages

Question 5

Which of the following kingdoms have the ability to perform photosynthesis?

Monera

Protista

Plantae

Answer 5

Monera, Protista, and Plantae all have the ability to perform photosynthesis.

Question 6

In the three domain classifications of life, members of domain archea have more biochemical similarities with which of the following:

Bacteria

Eukaryotes

Cyanobacteria

Answer 6

Eukaryotes

Question 7

Which of the following is NOT a function of the kidneys?

A. renal reabsorption

B. renal excretion

C. hormone secretion

D. filtration

E. micturition

Answer 7

micturition

Question 8

During photosynthesis, the light dependent reactions take place in the:

Answer 8

chloroplast

Question 9

The second law of thermodynamics states that:

Answer 9

all systems have a tendancy to move towards disorder

Question 10

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

A. Prophase

B. Metaphase

C. Anaphase

D. Interphase

E. Telophase

Answer 10

Interphase

Question 11

The region of the heart that initiates the heartbeat is the:

Answer 11

sinoatrial node

Question 12

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

Answer 12

peroxisome

Question 13

The first macromolecule that formed on Earth was:

Answer 13

RNA

Question 14

When the developing embryo has divided into 32 cells it is called a:

Answer 14

morula

Question 15

_______ is the final electron acceptor in the electron transport chain

A. Pyruvate

B. Oxygen

C. Carbon Dioxide

D. FAD
E. NADH

Answer 15

Oxygen

Question 16

Inside the cell, ribosomes are produced by what?

Answer 16

Nucleolus

Question 17

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

Answer 17

induction

Question 18

During human fertilization, sperm cells bind to the ________ of the egg.

Answer 18

zona pellucida

Question 19

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

Answer 19

totipotent

Question 20

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

A. Monera

B. Protista

C. Animalia

D. Plantae

E. Protista and Animalia

Answer 20

Protista and Animalia

Question 21

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

Answer 21

X Chromosome

Question 22

_______ enzymes have multiple binding sites.

A. Non-competitive

B. Competetive

C. Regulatory

D. Catalytic

E. Allosteric

Answer 22

Allosteric

Question 23

In a type III survivorship curve, mortality occurs:

Answer 23

early in life

Question 24

The innermost layer of the meninges is the:

Answer 24

pia mater

Question 25

Which of the following is true of the digestive, respiratory, and urinary systems?

A. They maintain fluid levels in the blood.

B. They maintain constant body temperature.

C. They maintain oxygen levels in the blood.

D. They maintain the balance of substances in the blood.

E. All of the above.

Answer 25

They maintain the balance of substances in the blood.

Question 26

Inside the cell, proteins are synthesized by what organelle?

Answer 26

Ribosomes