beb

The site of protein synthesis in cells is:

Select one:

a. nucleolus

b. smooth endoplasmic reticulum

c. Golgi apparatus

d. mitochondria

e. none of the above

Which of the following structures, not found in plant cells, is located near the nucleus of a nondividing animal cell and forms anchoring points for spindle fibers during cell division?

Select one:

a. endoplasmic reticulum

b. mitochondria

c. lysosomes

d. centrioles

e. none of the above

Which of the following structures serves as a packaging center for cellular proteins? (This structure packages proteins in vesicles.)

Select one:

a. the Golgi apparatus

b. the endoplasmic reticulum

c. ribosomes

d. the mitochondria

e. none of the above

If a diploid cell has 18 chromosomes before mitosis, how many chromosomes will each new cell have after mitosis is complete?

Select one:

a. 9

b. 36

c. 18

d. 72

e. none of the above

ATP synthesis occurs in which of the following organelles?

Select one:

a. chloroplasts

b. mitochondria

c. smooth endoplasmic reticulum

d. ribosomes

e. none of the above

Homologous chromosomes are "alike" chromosomes of diploid cells and which carry genes for the same traits.

Select one:

a. True

b. False

Who is known as the father of biology?

0) The theory of spontaneous generation was refuted by the work of

a. Louis Pasteur. b. Robert Koch. c. Robert Hooke. d. Antoni van Leeuwenhoek.

1) A pure culture

a. is sterile.

b. is a population of identical cells.

c. is made of a clearly defined chemical medium.

d. contains one microbial cell.

============================

2) Microorganisms play key roles in the cycling of important nutrients in plant nutrition, particularly those of

a. carbon. b. nitrogen. c. sulfur. d. carbon, nitrogen, and sulfur.

===========================

3) The structure that confers structural strength on the cell is known as the

a. cytoplasmic membrane. b. cell wall. c. ribosome. d. cytoplasm.

The discoverers of electron microscope are

A Huxley and Virchow

B Leeuwenhok and Hooke

C Knoll and Ruska

D Farmer and Moore

The nucleus of a plant cell was discovered by

A Robert Brown

B Huxley

C Virchow

D Hammerling

1. Who was discovered Nucleus of cell ?

What are the names of the elements with the followingsymbols?
(a) Ne
(b) Li
(c) He

What are the most common names for these compounds and ions?
(a) CH4


(b) NH3


(c) SO42-


(d) C2H3O2 ?

What are the most common names for these compounds and ions?
(PO43-) =

What is the most common cause of gastroenteritis?

In a conductor carrying a current we expect the electron driftspeed to be:
Question 2 options:
a) much greater than the average electron speed
b) much less than the average electron speed
c) about the same as the average electron speed
d) less than the electron speed at low temperature and greater thanthe electron speed at high temperature
e) less than the electron speed at high temperature and greaterthan the electron speed at low temperature

Engine torque is highest at

a. Low speed.

b. Intermediate speed.

c. High speed.

d. both low and high speed.

Define torque?

An unstretched spring with a spring constant 34N/m is suspendedfrom the ceiling. A 51kg mass is attached to the spring and letfall. How far does it stretch the spring? What is the potentialenergy stored in the srping in the stretched state? What is themaximum velocity as the spring is stretched?

I tried to solve this problem I set the PE = KE and then foundvelocity, height however the problem is still wrong????

A spring is hanging from the ceiling. Attaching a 680 gram physicsbook to the spring causes it to stretch 16cm in order to come toequilibrium.
what is the book's maximum speed??

Define the translational equilibrium.

Define equilibrium?in physics 

Which cosmic distance measurement techniques are considered standard candle techniques?

Define standard candle.

Define stability?

an ice cube has been given a push and slides without friction on a level table. which is correct?

An ice cube has been given a push and slides without friction on a level table. Which is correct? (a) It is in unstable equilibrium. (b) It is in neutral equilibrium. (c)It is not in equilibrium. (d) It is in stable equilibrium.

A cube resting on a horizontal tabletop is in

a) stable equilibrium
b) unstable equilibrium
c) positive equilibrium
d) neutral equilibrium

What are the types of equilibrium?

Consider a vehicle moves with constant velocity. What can be said about the speed of the vehicle?

Fruit stored under refrigeration conditions for extended periods of time might undergo

1. Chemical changes that result in a change in flavor, color

2. Chemical change and will not be safe to eat

3. Chemical changes that result in a change of flavor, color, and texture but safe to eat

4. None of these

If no external forces act on a moving object, it will

1. Come to rest after some time

2. Keep moving in the same direction with speed decreasing continuously

3. Change its direction of motion, but the speed remains the same

4. Keep moving in the same direction with the same speed

Which example of the change in velocity will produce an acceleration

1. A boy running on a road with constant speed

2. A vehicle running with 50 m/sec speed

3. An object performing circular motion with constant speed

4. A particle moving in the vacuum with constant speed

A vehicle will undergo acceleration when it changes its ______.

If a vehicle is traveling twice as fast then what will be the effect on the kinetic energy of the vehicle?

The Laplace transform can be applied to both linear and non linear differential equations.

True

False

Temperature depends on the amount of substance present?

True or False

A system has "memory" if y(t₁) depends on u(t₁) as well as u(t), t>t₁. True False

solve the differential equation by variation of parameters. y'' + y = sin(x)

the method of variation of parameters is used to solve for the particular solution of an homogensnous differential equation. true or false

Which of the following is true regarding the speed of light?

1. The speed of light varies in space with the wavelength

2. The speed of light increases when it travels through matter

3. It is constant for all electromagnetic waves traveling in a vacuum

4. Its value is 200000 km/hr