Live Environment Midterm review

A microscope with 10x and 40x objectives is used to scan a slide to locate a specimen. The largest field of vision would be provided by using the

10x objective

Neither enzyme works at a PH of

13

Which Ph indicates a substance that is more acidic than a substance with a ph of 4

2

What do letters A and B represent

A-maltade; B-Lipase

Pepsin works in which type of environment?

Acidic,only

A step in a procedure used in the diffusion through a membrane lab is represented in the diagram below Which procedure is represented in the diagram

Adding salt solution to a speciment under the cover glass

The structure labeled X most likely represents

An enzyme

Letter A and letter B in the chemical reactions above most likely represent

An organic catalyst

Maple treed and tulips are classified as autotrophs because they both

Are able to synthesize organic molecules from inorganic raw materials

Trypsin works best in which type of environment

Basic

Which formula represents an organic compound?

C12H22O11

The products of aerobic respiration in green plants are ATP

Carbon dioxide and water

Two test tubes were filled with a solution of bromthymol blue. A student exhaled through a straw into each tube, and the bromthymol blue turned yellow. An aquatic green plant was placed into each tube, and the tubes were corked. One tube was placed in the dark, and one was placed in direct sunlight. The yellow solution in the tube in sunlight turned blue, while the one in the dark remained yellow. Which statement best explains why the solution in the tube placed in sunlight returned to a blue color?

Carbon dioxide was removed by photosynthesis.

During the process of photosynthesis, energy from the sun is converted into

Chemical energy in the bonds of organic molecules

An experiment was designed to determine if chlorophyll is responsible for the growth of corn seedlings toward light. In the experiment, equal members of albino corn seedlings and green corn seedlings were grown ATA a temperature of 24 degrees Celsius. All other environmental conditions were the same for both groups of seedlings. The result of the experiment showed that both the albino seedlings and the green seedlings bent toward light. Identify a possible hypothesis

Chlorophyll is responsible for the growth of corn seedlings towards light

Which organelle outside the cell nucleus contain genetic material

Chloroplasts and mitochondria

The movement of molecules from side A to Side B is an example of the process of

Diffusion

Which cell organelle is composed of a series of channels throughout the cytoplasm that functions in the transport of molecules?

Endoplasmic Reticulum

Which sentence represents a hypothesis

Environmental conditions affect the pollination of plants

A certain enzyme will hydrolyze egg white but not starch. Which statement best explains this observation?

Enzyme molecules are specific in their actions.

Lipase, Maltese, and protease are members of a group of catalysts known as

Enzymes

The ribosomes of plant cells are sites for the synthesis of

Enzymes

If a starch digesting enzyme were added to a sports gel that lists starch as an ingredient, which substance would increase in concentration

Glucose

Which compound has the structural formyla shown in the diagram?

Glucose

The graph below shows the relative concentrations o certain hormones 1 in the blood during the human female reproductive cycle.

Hormone B on Day 2

Which elements are presents in all organic compounds?

Hydrogen and Carbon

The graph below provides information about the reproductive rates of four species of Bacteria, A,B,C, and D, at different temperatures Which statement is valid conclusion based on the information in the graph?

Individual species reproduce within a specific range of temperatures.

Which sentence represents a problem that will be investigated

Is water depth in a lake related to available light in the water

Which statement best describes the plasma membrane of a living plant cell?

It selectively regulates the passage of substances into and out of the cell

A cell observed 9 cells in the low power field of view. When switching to high power the number of cells visible will be

Less

A wet mount slide preparation of a speciment is stained in order to

Make cell structures more visible

Write the structures listed below in order from least to most complex

Organelle, Cell, Tissue, organ, organism

Chemicals that help chemical reactions occur at faster rates in living organisms are known as

Organic catalysts

Using one or more complete sentences, explain why a test tube of material being heated over an open flame should not be stoppered.

Pressure in the test tube will build up causing the stopper can pop off along with the liquid in the test tube.

Organic compounds are used as building blocks for

Protein,starches,and fats

A coverslip should be slowly lowered from a 45 degree angle into a slide in order to

Reduce the formation of air bubbles

Which organelles is correctly paired with it's specific function?

Ribosome-synthesis of proteins

The products would most likely contain

Simple sugars

Which statement represents an unsafe procedure for heating a nutrient solution in the flask

Stopper the flask tightly to prevent evaporation of the solution

A student use a light microscope to observe a cell under low power. After the student switched to high power and attempted to focus, the cell was no longer visible. What was most likely the cause of the disappearance

The cell was not in the che center of the field of view when the student observed it under low power

Which statement is best supported by the diagram?

The protein molecules are too large diffuse out of the cell

Which statement is based by the diagram

The protein molecules are too large to diffuse out of the cell

Based on Experimental results, a biologist in a laboratory reports a new discovery. If the experimental results are valid, biologists in other laboratories should be able to perform

The same experiment and obtain the same results

Some sea slugs store chloroplasts obtained from algae they have ingested. The chloroplasts continue to carry out photosynthesis within the slugs. What advantage would this activity be to these sea slugs? 1. The slugs with chloroplasts can synthesize some of their own food 2. The slugs with chloroplasts no longer need to carry out respiration 3. The chloroplasts provide the slugs with camouflage that protects them from UV radiation 4. The chloroplasts contain enzymes that allow the slugs to digest starch

The slugs with chloroplasts synthesize some of their own food

Which statement describes all enzymes?

They affect of the rate of chemical reactions

In an experiment, what should be the relationship between the control group and the experimental group?

They should be identical in all respects except one

During the preparation of a wet mount of an Elodea leaf, a student dropped a plastic cover slip directly on top of the drop of water containing the specimen on the slide. This slide preparation technique most probably

Trapped air bubbles under the cover slip

Which piece of equipment could be used to determine the mass of a frog

Triple beam balance

The function of most proteins depends primarily on the

Type and order of amino acids

Which pair of compounds could be classified as inorganic

Water and salt

What are some rules that must be followed when heating a substance in a test tube as in the photograph below

Wear Goggles, Tie long hair back, pull up long sleeves, place then tube at an angle with the tip on the flame, be sure the test tube is not facing anyone, be sure that there is no stopper on the test tube being heated, and don't hold the test tube with your fingers.

Which safety precaution is recommended when a liquid is being heated in a test tube?

Wear goggles and a laboratory apron

When are safety goggles used in a laboratory

When heating Chemicals,During Dissections, When using chemicals.

A student observing a specimen using the low-power objective of a compound light microscope has difficulty viewing the image because the field of view is too dark. The student can correct the problem by

adjusting the diaphragm

A new concept that is tested in a scientific investigation is known as

hypothesis

The shape of a protein is most directly determined by the

kind and sequence of amino acids in the protein

Which organelles are most closely associated with the process of aerobic respiration

mitochondria

Which process uses energy to combine inorganic molecules to synthesize organic molecules?

photosynthesis

The main result of aerobic respiration is the

production of ATP from the breakdown of glucose