Biology Lecture Quiz: 2, 3, 4, 5.4

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

A nuetral atom has an atomic number of 18 and a mass number of 32? How many electrons does it have?

18

A nuetral atom has an atomic number of 18 and a mass number of 32? How many protons does it have?

18

In addition to carbon, an organic molecule must contain

hydrogen

The weak attractions between water molecules (the dotted lines) are known as

hydrogen bonds

During an osmosis experiment in class, you look at some cells under the microscope. You notice the cells look shriveled. What type of solution were the cells immersed in?

hypertonic

Which of the following is a hydrolysis reaction?

glycogen forming glucose molecules

The pH of pure water is [BLANK] because [BLANK].

7.0; water contains an equal number of H+ ions and OH- ions.

A neutral atom has an atomic number of 18 and a mass number 32. How many electrons are in the valence shell of this atom?

8

Which of the following charateristics of water, gives a water molecule the ablilty to cling to another polar surface?

Adhesion

Which of the following statements about basic solutions is true?

Basic solutions release OH-.

Which of the following is a steroid that provides stability with the plasma membrane of an animal cell?

Cholesterol

Sulfur has an atomic number of 16. How many valence shell electrons does it have?

Six

What is the term of the loss of the 3D shape of a protein & thereby elminating its function?

Denaturation

What is the term for what might happen to an plant cell in a isotonic environment?

Flaccid

Which organelle is responsible for the synthesis of lipids and detoxification of toxic substance?

Smooth Endoplasmic Reticulum

What is the term for what might happen to an animal cell in a hypotonic environment?

Lysis

Which of the following is responsible for the synthesis of ribosomes?

Nucleolus (nucleoli)

Which of the following contains DNA and proteins?

Nucleus

Which of the following describes the process by which cells use pseudopods to bring in large food particals & is often called "cell eating"

Phagocytosis.

The linear sequence of amino acids in a polypeptide chain is referred to as its [BLANK] structure.

Primary

Which of the following describes saturated fats?

They contain only signal bonds between atoms in their carbon skeleton.

if a cell is placed in a hypotonic solution, which will occur?

Water will move into the cell from the surrounding solution.

The four main catagories of organic macromolecules are

carbonhydrates, lipids, proteins, and nucleic acids.

The main structural component of a plant cell wall is...

cellulose.

A molecule that regulates the fluidity of animal cell membrane by stiffening the membrane at higher tempeture and preventing the membrane from freezing at lower temperature is

cholesterol

All cells have some charateristics in common ; both ptokaryotic and eukaryotic cells have

cytoplasm, a plasma membrane, ribosomes and DNA.

A prokaryotic cell

does not have a membrane-bound nucleus.

The gycolproteins found in the plasma membrane fuction in what capacity.

establishing to identitiy of the cell

The cell wall of bacteria cells and plant cell functions in

maintaining cell shape.

Which one of the following is an function of proteins

metabolism

Cyanide binds and impairs one of the molecules involved in the synthesis of ATP. The target organelle for cyanide must be...

mitochondria.

Both plants and animals need mitochondria to

produce ATP.

Amino Acids are needed to build [BLANK], just as [BLANK] are needed to create DNA.

proteins; nucleotides

Which of the following methods of transport using a coated pit with proteins receotirs to take in a specific type of molecule, such as cholesterol?

receptor-mediated endocytosis

After drinkning a great deal of coffee (pH 5), a human blood buffering system would need to [BLANK] as the coffee was digested to lower the level of acid present in the blood stream

take up H+

Plasma membrane are selectively permeable. This means that

the plasma membrane allows some substances to enter or leve a cell more easy than others.

What prevents a plant cell from bursting in a hypotonic solution?

the presents of a cell wall

As discussed in the Connections for this Chapter, what are omega-3 fatty acids.

unsaturated fats that promote brain and cardiovascular health

The reactivity of an atom depends on the number of...

valence electrons.

In which way are vesticals different from vacuoles?

vesticles are smaller than vacuoles


संबंधित स्टडी सेट्स

Year 11 Chemistry Lewis Structure and electron dot diagrams

View Set

OB Ch. 10 Assessment of High Risk Pregnancy

View Set

osha 30 module 14 personal protective equipment

View Set

NCLEX 1 Pretest Mistakes Saunders

View Set

week 9 Pharmacology (ATI) Musculoskeletal System

View Set

OB _ Practice HESI Exam _ Gestational Diabetes _ Case Study _ 2023

View Set

Review (Ratio, Rates, Percentages)

View Set

Art 206 (Chap 1 Unit Exam 1 Prep)

View Set