Which of the following is NOT part of the

endomembrane system of the animal cell?

mitochondria

Which of the following is controlled via positive feedback?

blood clotting

Splitting a dipeptide into two free amino acids is a

hydrolysis reactions

This tissue type consistently contains the most

protein:

muscle tissue

18 carbon steroids

estrogens

Contain the most carbons

corticoids

Which of the following is NOT a primary

characteristic of water?

water has a low density

This enzyme digests protein

peptidase

Which of the following will produce the fastest

response in the target cell?

ligand-gated ion channel

Which of the following is a carbonyl functional

group?

–C=O

Neurohormones are the only chemical messenger

secreted by neurons.

false

For every pyruvate consumed in pyruvate

decarboxylation, exactly _______ molecule(s) of ATP

are directly produced.

0

Excess GH production during puberty causes

gigantism

Alpha helices produce ____ of a protein.

secondary structure

Endocytosis is an example of passive transport.

false

If the tight junctions found between the epithelial

cells that line the stomach failed, which of the

following would be the most likely to immediately

occur?

gastric juices (acid) would leak between

the cells and damage the underlying tissues

The synthesis of fatty acids requires NADH.

true

This hormone is non-tropic.

PRL

In the process of cellular respiration, glucose is

oxidized

lactase

enzyme (1 pt) that splits lactose (1 pt) into glucose (1 pt) and galactose (1 pt)

carboxyl

--COOH functional group (3 pts); also called a carboxylic acid (1 pt) found in organic

acids (1 pt)

corticoids

21 C (1 pt) steroid (1 pt) secreted by the adrenal cortex (1 pt); synthesized from cholesterol (1 pt); hydrophobic (1 pt)

oxaloacetate

molecule in the Krebs cycle (2 pts); that receives Acetyl- (1 pt) to become citrate (1 pt)

thyroglobin

protein (1 pt) found in the thyroid (1 pt); contains tyrosine (1 pt) that is iodinated (1 pt) to produce thyroid hormone (1 pt)

peptide bond

covalent bonds between two adjacent amino acids (2 pts) forms between a carboxyl group (1 pt) in one amino acid and the amino group (1 pt ) in the adjacent amino acid (1 pt)

symport

membrane transporter (1 pt) that moves two chemical species across a membrane in the same direction (2 pts)

lysosomes

organelle (1 pt) that is part of the endomembrane system (1 pt) and contains digestive enzymes (2 pts)

catecholamine (or epinephrine)