I absolutely need CORRECT answers in 2 HOURS!!
Why is sexual reproduction still around? (Choose all that apply)
A. fitness of the population
B. populates areas rapidly
C. cost of meiosis
D. frequency dependent relationship between hosts and parasites
E. limited genetic diversity
Almost all life cycles will have haploid and diploid phases. The transition from haploid to diploid occurs
A.after DNA replication during the S phase of the cell cycle
B.once the origin of replication is complete and the septum has formed
C.during crossing over in prophase I of meiosis
D.when gametes fuse during fertilization
Some cell processes are influenced by multiple signaling pathways that converge on the same molecular targets.
Where are most of the enzymes for the ETC located?
A human fertilized egg contains one chromosome with HbS, the allele for sickle cell disease, and a homologous chromosome with Hbs, the wildtype allele. It also contains an X and Y chromosome. At what point will meiosis occur to create cells that are either HbS or Hbs ?
Inositol phopholipids are (select all that apply)
In the Calvin Cycle, carbon from carbon dioxide is fixed to what molecule first?
What statement describes protein phosphorylation?
A newly-discovered butterfly species has a chromosome number of . Match the total number of chromosomes in each type of cell.
In the quest to understand the basis of infertility in humans, researchers have identified a mutation in a gene associated with chiasmata. This protein normally acts to promote homologous recombination.
When has glucose been broken down from its original 6 carbon molecule to 2 carbon dioxides in the citric acid cycle?
To efficiently provide the ideal amount of nitrogen fertilizer, some farmers make use of a “chlorophyll meter” that measures the amount of green light reflected off a leaf.
The net results of glycolysis are
A.1 NADH and 1 ATP
B.2 NADH and 2 ATP
C.4 NADH and 2 ATP
D.2 NADH and 4 ATP
What vitamin acts as a coenzyme in cell respiration and is important in alcohol fermentation?
Which event distinguishes anaphase from anaphase II?
A.Anaphase produces haploid daughter cells and anaphase II results in diploid daughter cells
B.Sister chromatids separated in anaphase II are different while they are identical in anaphase
C.Spindle fibers separate the kinetochores in chromosomes in anaphase.
D.The ploidy level will be reduced in anaphase II.
E.Homologous chromosomes are separated in anaphase and chromosomses are separated in anaphase II
When a ligand binds to a G protein-linked receptor, the G protein
A.binds to a signal molecule
B.releases a hormone
The electron transport chain between photosystem II and photosystem I generate a proton gradient which drives ATP synthase known as
________ are ligands, which promote cell growth.
The majority of the energy remains in what glycolytic final product?
A How are light reactions related to dark reactions?
A.Light reactions produce ADP and NADP+ and the dark reactions use ADP and NADP+
B.Light reactions produce ATP and NADPH and the dark reactions use ATP and NADPH
C.Dark reactions produce ADP and NADP+ and the light reactions use ADP and NADP+
D.Dark reactions produce ATP and NADPH and the light reactions use ATP and NADPH
What is the relationship between cellular aerobic respiration and photosynthesis?
A.The processes occur in the same organelles
B.They use the same reactants and produce the same products
C.They are inverse of each other
D.They are reverse of each other
C6H12O6 + 6O2 → 6H2O + 6CO2is an example of ____________. (This question refers to what is occurring on the right side of the reaction.)
Which event may lead to cancer? Select all that apply.
A. gene mutation
B. functioning p53 protein
C. Rb protein phosphorylating
D. Improper replication of DNA during synthesis
E. faulty DNA repair
Damaged DNA can potentially be repaired during which checkpoint. Select all that apply.
Which sequence best describes apoptosis at the G1 checkpoint?
A.p53 levels rise → p21 production increase → Cdk/cyclin complex is inhibited
B.p21 production increase → Cdk/cyclin complex is inhibited→ p53 levels rise
C.Cdk/cyclin complex is inhibited→ p21 production increase → p53 levels rise
D.Cdk/cyclin complex is inhibited→ p53 levels rise → p21 production increase
E.p53 levels rise → Cdk/cyclin complex is inhibited→ p21 production increase
In a cell with 8 duplicated chromosomes, at which phase do the daughter chromosomes contain single chromatids?